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WHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with BASIC CONFIGURATION EXAMPLE Basic Configuration Example. 8.1.1. Let's Begin! First, we must learn how to install and configure Pgpool-II and database nodes before using replication. 8.1.1.1. Installing Pgpool-II. Installing Pgpool-II is very easy. In the directory which you have extracted the source tar ball, execute the following commands. PGPOOL-II + WATCHDOG SETUP EXAMPLE Pgpool-II + Watchdog Setup Example. This section shows an example of streaming replication configuration using Pgpool-II. In this example, we use 3 Pgpool-II servers to manage PostgreSQL servers to create a robust cluster system and avoid the single point of failure or split brain. PostgreSQL 13 is used in this configuration example. INSTALLATION OF PGPOOL-II Chapter 2. Installation of Pgpool-II. Table of Contents 2.1. Planning 2.1.1. Clustering mode of PostgreSQL 2.1.2. PGPOOL-II 4.2.3 DOCUMENTATION pgpool-II 4.2.3 Documentation The Pgpool Global Development Group. Copyright © 2003-2021 The Pgpool Global Development Group AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.HEALTH CHECK
The health check process collects various statistics data such as number of health check count in total. To inspect the statistics data, use SHOW POOL_HEALTH_CHECK_STATS command. Please note that the data is stored in the shared memory area and it will be initialized upon Pgpool-II starting up. Following parameter names can also have numeric suffix at the end of each name.SHOW POOL NODES
SHOW POOL_NODES displays the node id, the hostname, the port, the status, the weight (only meaningful if you use the load balancing mode), the role, the SELECT query counts issued to each backend, whether each node is the load balance node or not, the replication delay (only if in streaming replication mode) and last status changetime. In
PGPOOL-IIとは?TRANSLATE THIS PAGE コネクションプーリング. Pgpool-II は、 PostgreSQL サーバへの確立された接続を維持し、プロパティ(つまりユーザ名、データベース、プロトコルバージョン、他に指定されていれば接続パラメータも)が同じ新規のコネクションが到着する度に再利用します。 。 コネクションオーバヘッドを軽減WHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with BASIC CONFIGURATION EXAMPLE Basic Configuration Example. 8.1.1. Let's Begin! First, we must learn how to install and configure Pgpool-II and database nodes before using replication. 8.1.1.1. Installing Pgpool-II. Installing Pgpool-II is very easy. In the directory which you have extracted the source tar ball, execute the following commands. PGPOOL-II + WATCHDOG SETUP EXAMPLE Pgpool-II + Watchdog Setup Example. This section shows an example of streaming replication configuration using Pgpool-II. In this example, we use 3 Pgpool-II servers to manage PostgreSQL servers to create a robust cluster system and avoid the single point of failure or split brain. PostgreSQL 13 is used in this configuration example. INSTALLATION OF PGPOOL-II Chapter 2. Installation of Pgpool-II. Table of Contents 2.1. Planning 2.1.1. Clustering mode of PostgreSQL 2.1.2. PGPOOL-II 4.2.3 DOCUMENTATION pgpool-II 4.2.3 Documentation The Pgpool Global Development Group. Copyright © 2003-2021 The Pgpool Global Development Group AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.HEALTH CHECK
The health check process collects various statistics data such as number of health check count in total. To inspect the statistics data, use SHOW POOL_HEALTH_CHECK_STATS command. Please note that the data is stored in the shared memory area and it will be initialized upon Pgpool-II starting up. Following parameter names can also have numeric suffix at the end of each name.SHOW POOL NODES
SHOW POOL_NODES displays the node id, the hostname, the port, the status, the weight (only meaningful if you use the load balancing mode), the role, the SELECT query counts issued to each backend, whether each node is the load balance node or not, the replication delay (only if in streaming replication mode) and last status changetime. In
PGPOOL-IIとは?TRANSLATE THIS PAGE コネクションプーリング. Pgpool-II は、 PostgreSQL サーバへの確立された接続を維持し、プロパティ(つまりユーザ名、データベース、プロトコルバージョン、他に指定されていれば接続パラメータも)が同じ新規のコネクションが到着する度に再利用します。 。 コネクションオーバヘッドを軽減PGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. 7.1. BASIC CONFIGURATION EXAMPLE 7.1.1.4. Preparing Database Nodes. Now, we need to set up backend PostgreSQL servers for Pgpool-II .These servers can be placed within the same host as Pgpool-II, or on separate machines.If you decide to place the servers on the same host, different port numbers must be assigned for each server. INSTALLATION OF PGPOOL-II Chapter 2. Installation of Pgpool-II. Table of Contents 2.1. Planning 2.1.1. Clustering mode of PostgreSQL 2.1.2. PGPOOL-II ON KUBERNETES 8.5.1. Introduction. Because PostgreSQL is a stateful application and managing PostgreSQL has very specific requirements (e.g. backup, recovery, automatic failover, etc), the built-in functionality of Kubernetes can't handle these tasks. Therefore, an Operator that extends the functionality of the Kubernetes to create and manage PostgreSQL is required.PGPOOL SHOW
Description. PGPOOL SHOW will display the current value of Pgpool-II configuration parameters. This command is similar to the SHOW command in PostgreSQL with an addition of PGPOOL keyword to distinguish it from the PostgreSQL SHOW command.PGPOOL_SETUP
Description pgpool_setup creates a temporary installation of Pgpool-II cluster, which includes a Pgpool-II installation and specified number of PostgreSQL installations under current directory. Current directory must be empty before running pgpool_setup.. pgpool_setup is for testing purpose only and should not be used to create productioninstallations.
SERVER COMMANDS
This part contains reference information for server commands. Currently only pgpool falls into this category.RESTRICTIONS
Functionality of PostgreSQL. If you use pg_terminate_backend() to stop a backend, this will trigger a failover. The reason why this happens is that PostgreSQL sends exactly the same message for a terminated backend as for a full postmaster shutdown. There is no workaround prior of version 3.6. From version 3.6, this limitation has beenmitigated.
SHOW POOL NODES
Description. SHOW POOL_NODES displays the node id, the hostname, the port, the status, the weight (only meaningful if you use the load balancing mode), the role, the SELECT query counts issued to each backend, whether each node is the load balance node or not, the replication delay (only if in streaming replication mode) and laststatus change time.
PERFORMANCE CONSIDERATIONS There are number of configuration parameters that affect the performance of Pgpool-II.In this chapter we present how to tune them.WHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with BASIC CONFIGURATION EXAMPLE Basic Configuration Example. 8.1.1. Let's Begin! First, we must learn how to install and configure Pgpool-II and database nodes before using replication. 8.1.1.1. Installing Pgpool-II. Installing Pgpool-II is very easy. In the directory which you have extracted the source tar ball, execute the following commands. PGPOOL-II + WATCHDOG SETUP EXAMPLE Pgpool-II + Watchdog Setup Example. This section shows an example of streaming replication configuration using Pgpool-II. In this example, we use 3 Pgpool-II servers to manage PostgreSQL servers to create a robust cluster system and avoid the single point of failure or split brain. PostgreSQL 13 is used in this configuration example. INSTALLATION OF PGPOOL-II Chapter 2. Installation of Pgpool-II. Table of Contents 2.1. Planning 2.1.1. Clustering mode of PostgreSQL 2.1.2. PGPOOL-II 4.2.3 DOCUMENTATION pgpool-II 4.2.3 Documentation The Pgpool Global Development Group. Copyright © 2003-2021 The Pgpool Global Development Group AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.HEALTH CHECK
The health check process collects various statistics data such as number of health check count in total. To inspect the statistics data, use SHOW POOL_HEALTH_CHECK_STATS command. Please note that the data is stored in the shared memory area and it will be initialized upon Pgpool-II starting up. Following parameter names can also have numeric suffix at the end of each name.SHOW POOL NODES
SHOW POOL_NODES displays the node id, the hostname, the port, the status, the weight (only meaningful if you use the load balancing mode), the role, the SELECT query counts issued to each backend, whether each node is the load balance node or not, the replication delay (only if in streaming replication mode) and last status changetime. In
PGPOOL-IIとは?TRANSLATE THIS PAGE コネクションプーリング. Pgpool-II は、 PostgreSQL サーバへの確立された接続を維持し、プロパティ(つまりユーザ名、データベース、プロトコルバージョン、他に指定されていれば接続パラメータも)が同じ新規のコネクションが到着する度に再利用します。 。 コネクションオーバヘッドを軽減WHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with BASIC CONFIGURATION EXAMPLE Basic Configuration Example. 8.1.1. Let's Begin! First, we must learn how to install and configure Pgpool-II and database nodes before using replication. 8.1.1.1. Installing Pgpool-II. Installing Pgpool-II is very easy. In the directory which you have extracted the source tar ball, execute the following commands. PGPOOL-II + WATCHDOG SETUP EXAMPLE Pgpool-II + Watchdog Setup Example. This section shows an example of streaming replication configuration using Pgpool-II. In this example, we use 3 Pgpool-II servers to manage PostgreSQL servers to create a robust cluster system and avoid the single point of failure or split brain. PostgreSQL 13 is used in this configuration example. INSTALLATION OF PGPOOL-II Chapter 2. Installation of Pgpool-II. Table of Contents 2.1. Planning 2.1.1. Clustering mode of PostgreSQL 2.1.2. PGPOOL-II 4.2.3 DOCUMENTATION pgpool-II 4.2.3 Documentation The Pgpool Global Development Group. Copyright © 2003-2021 The Pgpool Global Development Group AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.HEALTH CHECK
The health check process collects various statistics data such as number of health check count in total. To inspect the statistics data, use SHOW POOL_HEALTH_CHECK_STATS command. Please note that the data is stored in the shared memory area and it will be initialized upon Pgpool-II starting up. Following parameter names can also have numeric suffix at the end of each name.SHOW POOL NODES
SHOW POOL_NODES displays the node id, the hostname, the port, the status, the weight (only meaningful if you use the load balancing mode), the role, the SELECT query counts issued to each backend, whether each node is the load balance node or not, the replication delay (only if in streaming replication mode) and last status changetime. In
PGPOOL-IIとは?TRANSLATE THIS PAGE コネクションプーリング. Pgpool-II は、 PostgreSQL サーバへの確立された接続を維持し、プロパティ(つまりユーザ名、データベース、プロトコルバージョン、他に指定されていれば接続パラメータも)が同じ新規のコネクションが到着する度に再利用します。 。 コネクションオーバヘッドを軽減 INSTALLATION OF PGPOOL-II Chapter 2. Installation of Pgpool-II. Table of Contents 2.1. Planning 2.1.1. Clustering mode of PostgreSQL 2.1.2.PGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
MANAGING CLIENT CONNECTIONS Managing Client Connections. 7.2. Managing Client Connections. As the number of client connections accepted is growing, the number of Pgpool-II child process which can accept new connections from client is decreasing and finally reaches to 0. In this situation new clients need to wait until aWATCHDOG - PGPOOL
use_watchdog (boolean) . If on, activates the watchdog. Default is off This parameter can only be set at server start. Pgpool-II 4.1 or earlier, because it is required to specify its own pgpool node information and the destination pgpool nodes information, the settings are different per pgpool node. Since Pgpool-II 4.2, all configuration parameters are identical on all hosts.PGPOOL SHOW
Description. PGPOOL SHOW will display the current value of Pgpool-II configuration parameters. This command is similar to the SHOW command in PostgreSQL with an addition of PGPOOL keyword to distinguish it from the PostgreSQL SHOW command. PGPOOL-II ON KUBERNETES 8.5.1. Introduction. Because PostgreSQL is a stateful application and managing PostgreSQL has very specific requirements (e.g. backup, recovery, automatic failover, etc), the built-in functionality of Kubernetes can't handle these tasks. Therefore, an Operator that extends the functionality of the Kubernetes to create and manage PostgreSQL is required.SERVER COMMANDS
This part contains reference information for server commands. Currently only pgpool falls into this category. PERFORMANCE CONSIDERATIONS There are number of configuration parameters that affect the performance of Pgpool-II.In this chapter we present how to tune them.RESTRICTIONS
Functionality of PostgreSQL. If you use pg_terminate_backend() to stop a backend, this will trigger a failover. The reason why this happens is that PostgreSQL sends exactly the same message for a terminated backend as for a full postmaster shutdown. There is no workaround prior of version 3.6. From version 3.6, this limitation has beenmitigated.
WHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used withPGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. MANAGING CLIENT CONNECTIONS Managing Client Connections. 7.2. Managing Client Connections. As the number of client connections accepted is growing, the number of Pgpool-II child process which can accept new connections from client is decreasing and finally reaches to 0. In this situation new clients need to wait until a AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL TUTORIAL - PGPOOL WIKI This chapter explains how to get start with Pgpool-II.. Table of Contents 1. Getting Started 1.1. Installation 1.2. Your FirstReplication
AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
INSTALLING PGPOOL_RECOVERY 2.6. Installing pgpool_recovery. Pgpool-II need function of pgpool_recovery, pgpool_remote_start and pgpool_switch_xlog, when you use the online recovery that describes latter.Also pgpoolAdmin of management tool, stop, restart or reload a PostgreSQL on the screen by use pgpool_pgctl.It is enough, if these function installed intemplate1 first.
WATCHDOG - PGPOOL
use_watchdog (boolean) . If on, activates the watchdog. Default is off This parameter can only be set at server start. Pgpool-II 4.1 or earlier, because it is required to specify its own pgpool node information and the destination pgpool nodes information, the settings are different per pgpool node. Since Pgpool-II 4.2, all configuration parameters are identical on all hosts. ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.ONLINE RECOVERY
Online recovery is performed in two phases. The first phase is called "first stage" and the second phase is called "second stage". Only native_replication_mode and snapshot_isolation_mode require the second stage. For other modes including streaming replication mode the second stage is not performed and you don't need to provide a script for the stage in recovery_2nd_stage_command. i.e. youWHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used withPGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. MANAGING CLIENT CONNECTIONS Managing Client Connections. 7.2. Managing Client Connections. As the number of client connections accepted is growing, the number of Pgpool-II child process which can accept new connections from client is decreasing and finally reaches to 0. In this situation new clients need to wait until a AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL TUTORIAL - PGPOOL WIKI This chapter explains how to get start with Pgpool-II.. Table of Contents 1. Getting Started 1.1. Installation 1.2. Your FirstReplication
AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
INSTALLING PGPOOL_RECOVERY 2.6. Installing pgpool_recovery. Pgpool-II need function of pgpool_recovery, pgpool_remote_start and pgpool_switch_xlog, when you use the online recovery that describes latter.Also pgpoolAdmin of management tool, stop, restart or reload a PostgreSQL on the screen by use pgpool_pgctl.It is enough, if these function installed intemplate1 first.
WATCHDOG - PGPOOL
use_watchdog (boolean) . If on, activates the watchdog. Default is off This parameter can only be set at server start. Pgpool-II 4.1 or earlier, because it is required to specify its own pgpool node information and the destination pgpool nodes information, the settings are different per pgpool node. Since Pgpool-II 4.2, all configuration parameters are identical on all hosts. ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.ONLINE RECOVERY
Online recovery is performed in two phases. The first phase is called "first stage" and the second phase is called "second stage". Only native_replication_mode and snapshot_isolation_mode require the second stage. For other modes including streaming replication mode the second stage is not performed and you don't need to provide a script for the stage in recovery_2nd_stage_command. i.e. youPGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. PGPOOL-II + WATCHDOG SETUP EXAMPLE Pgpool-II + Watchdog Setup Example. This section shows an example of streaming replication configuration using Pgpool-II. In this example, we use 3 Pgpool-II servers to manage PostgreSQL servers to create a robust cluster system and avoid the single point of failure or split brain. PostgreSQL 13 is used in this configuration example. AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
5.11. STREAMING REPLICATION CHECK 5.11. Streaming Replication Check. Pgpool-II can work with PostgreSQL native Streaming Replication, that is available since PostgreSQL 9.0. To configure Pgpool-II with streaming replication, enable master_slave_mode and set master_slave_sub_mode to 'stream'.. Pgpool-II assumes that Streaming Replication is configured with Hot Standby on PostgreSQL, which means that the standby databaseRELEASE 3.7.15
A.18.1. Changes. Doc: mention that ssl_ciphers only affects to TLS 1.2 and lower. (Tatsuo Ishii) Doc: Improve the description of wd_priority. (Bo Peng) Patch is provided by Kenichiro Tanaka. Add mention about hostssl/hostnossl to pool_hba.conf sample file. (Tatsuo Ishii) PGPOOL-II 4.2.3 DOCUMENTATION pgpool-II 4.2.3 Documentation The Pgpool Global Development Group. Copyright © 2003-2021 The Pgpool Global Development GroupONLINE RECOVERY
Online recovery is performed in two phases. The first phase is called "first stage" and the second phase is called "second stage". Only native_replication_mode and snapshot_isolation_mode require the second stage. For other modes including streaming replication mode the second stage is not performed and you don't need to provide a script for the stage in recovery_2nd_stage_command. i.e. you CONFIGURING PCP.CONF Configuring pcp.conf. Pgpool-II provides a interface for administrators to perform management operation, such as getting Pgpool-II status or terminating Pgpool-II processes remotely. pcp.conf is the user/password file used for authentication by this interface. All operation modes require the pcp.conf file toTESTING REPLICATION
Testing Replication. Let's test the replication functionality using a benchmark tool pgbench, which comes with the standard PostgreSQL installation. Type following to create the benchmark tables. $ pgbench -i -p 11000 test. To see if the replication works correctly, directly connect to the primary and the standby server to see if they returnSHOW POOL NODES
SHOW POOL_NODES displays the node id, the hostname, the port, the status, the weight (only meaningful if you use the load balancing mode), the role, the SELECT query counts issued to each backend, whether each node is the load balance node or not, the replication delay (only if in streaming replication mode) and last status changetime. In
WHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used withPGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. MANAGING CLIENT CONNECTIONS Managing Client Connections. 7.2. Managing Client Connections. As the number of client connections accepted is growing, the number of Pgpool-II child process which can accept new connections from client is decreasing and finally reaches to 0. In this situation new clients need to wait until a AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL TUTORIAL - PGPOOL WIKI This chapter explains how to get start with Pgpool-II.. Table of Contents 1. Getting Started 1.1. Installation 1.2. Your FirstReplication
AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
INSTALLING PGPOOL_RECOVERY 2.6. Installing pgpool_recovery. Pgpool-II need function of pgpool_recovery, pgpool_remote_start and pgpool_switch_xlog, when you use the online recovery that describes latter.Also pgpoolAdmin of management tool, stop, restart or reload a PostgreSQL on the screen by use pgpool_pgctl.It is enough, if these function installed intemplate1 first.
WATCHDOG - PGPOOL
use_watchdog (boolean) . If on, activates the watchdog. Default is off This parameter can only be set at server start. Pgpool-II 4.1 or earlier, because it is required to specify its own pgpool node information and the destination pgpool nodes information, the settings are different per pgpool node. Since Pgpool-II 4.2, all configuration parameters are identical on all hosts. ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.ONLINE RECOVERY
Online recovery is performed in two phases. The first phase is called "first stage" and the second phase is called "second stage". Only native_replication_mode and snapshot_isolation_mode require the second stage. For other modes including streaming replication mode the second stage is not performed and you don't need to provide a script for the stage in recovery_2nd_stage_command. i.e. youWHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used withPGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. MANAGING CLIENT CONNECTIONS Managing Client Connections. 7.2. Managing Client Connections. As the number of client connections accepted is growing, the number of Pgpool-II child process which can accept new connections from client is decreasing and finally reaches to 0. In this situation new clients need to wait until a AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL TUTORIAL - PGPOOL WIKI This chapter explains how to get start with Pgpool-II.. Table of Contents 1. Getting Started 1.1. Installation 1.2. Your FirstReplication
AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
INSTALLING PGPOOL_RECOVERY 2.6. Installing pgpool_recovery. Pgpool-II need function of pgpool_recovery, pgpool_remote_start and pgpool_switch_xlog, when you use the online recovery that describes latter.Also pgpoolAdmin of management tool, stop, restart or reload a PostgreSQL on the screen by use pgpool_pgctl.It is enough, if these function installed intemplate1 first.
WATCHDOG - PGPOOL
use_watchdog (boolean) . If on, activates the watchdog. Default is off This parameter can only be set at server start. Pgpool-II 4.1 or earlier, because it is required to specify its own pgpool node information and the destination pgpool nodes information, the settings are different per pgpool node. Since Pgpool-II 4.2, all configuration parameters are identical on all hosts. ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.ONLINE RECOVERY
Online recovery is performed in two phases. The first phase is called "first stage" and the second phase is called "second stage". Only native_replication_mode and snapshot_isolation_mode require the second stage. For other modes including streaming replication mode the second stage is not performed and you don't need to provide a script for the stage in recovery_2nd_stage_command. i.e. youPGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. PGPOOL-II + WATCHDOG SETUP EXAMPLE Pgpool-II + Watchdog Setup Example. This section shows an example of streaming replication configuration using Pgpool-II. In this example, we use 3 Pgpool-II servers to manage PostgreSQL servers to create a robust cluster system and avoid the single point of failure or split brain. PostgreSQL 13 is used in this configuration example. AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
5.11. STREAMING REPLICATION CHECK 5.11. Streaming Replication Check. Pgpool-II can work with PostgreSQL native Streaming Replication, that is available since PostgreSQL 9.0. To configure Pgpool-II with streaming replication, enable master_slave_mode and set master_slave_sub_mode to 'stream'.. Pgpool-II assumes that Streaming Replication is configured with Hot Standby on PostgreSQL, which means that the standby databaseRELEASE 3.7.15
A.18.1. Changes. Doc: mention that ssl_ciphers only affects to TLS 1.2 and lower. (Tatsuo Ishii) Doc: Improve the description of wd_priority. (Bo Peng) Patch is provided by Kenichiro Tanaka. Add mention about hostssl/hostnossl to pool_hba.conf sample file. (Tatsuo Ishii) PGPOOL-II 4.2.3 DOCUMENTATION pgpool-II 4.2.3 Documentation The Pgpool Global Development Group. Copyright © 2003-2021 The Pgpool Global Development GroupONLINE RECOVERY
Online recovery is performed in two phases. The first phase is called "first stage" and the second phase is called "second stage". Only native_replication_mode and snapshot_isolation_mode require the second stage. For other modes including streaming replication mode the second stage is not performed and you don't need to provide a script for the stage in recovery_2nd_stage_command. i.e. you CONFIGURING PCP.CONF Configuring pcp.conf. Pgpool-II provides a interface for administrators to perform management operation, such as getting Pgpool-II status or terminating Pgpool-II processes remotely. pcp.conf is the user/password file used for authentication by this interface. All operation modes require the pcp.conf file toTESTING REPLICATION
Testing Replication. Let's test the replication functionality using a benchmark tool pgbench, which comes with the standard PostgreSQL installation. Type following to create the benchmark tables. $ pgbench -i -p 11000 test. To see if the replication works correctly, directly connect to the primary and the standby server to see if they returnSHOW POOL NODES
SHOW POOL_NODES displays the node id, the hostname, the port, the status, the weight (only meaningful if you use the load balancing mode), the role, the SELECT query counts issued to each backend, whether each node is the load balance node or not, the replication delay (only if in streaming replication mode) and last status changetime. In
WHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used withPGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. MANAGING CLIENT CONNECTIONS Managing Client Connections. 7.2. Managing Client Connections. As the number of client connections accepted is growing, the number of Pgpool-II child process which can accept new connections from client is decreasing and finally reaches to 0. In this situation new clients need to wait until a AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL TUTORIAL - PGPOOL WIKI This chapter explains how to get start with Pgpool-II.. Table of Contents 1. Getting Started 1.1. Installation 1.2. Your FirstReplication
AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
INSTALLING PGPOOL_RECOVERY 2.6. Installing pgpool_recovery. Pgpool-II need function of pgpool_recovery, pgpool_remote_start and pgpool_switch_xlog, when you use the online recovery that describes latter.Also pgpoolAdmin of management tool, stop, restart or reload a PostgreSQL on the screen by use pgpool_pgctl.It is enough, if these function installed intemplate1 first.
WATCHDOG - PGPOOL
use_watchdog (boolean) . If on, activates the watchdog. Default is off This parameter can only be set at server start. Pgpool-II 4.1 or earlier, because it is required to specify its own pgpool node information and the destination pgpool nodes information, the settings are different per pgpool node. Since Pgpool-II 4.2, all configuration parameters are identical on all hosts. ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.ONLINE RECOVERY
Online recovery is performed in two phases. The first phase is called "first stage" and the second phase is called "second stage". Only native_replication_mode and snapshot_isolation_mode require the second stage. For other modes including streaming replication mode the second stage is not performed and you don't need to provide a script for the stage in recovery_2nd_stage_command. i.e. youWHAT IS PGPOOL-II?
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used withPGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. MANAGING CLIENT CONNECTIONS Managing Client Connections. 7.2. Managing Client Connections. As the number of client connections accepted is growing, the number of Pgpool-II child process which can accept new connections from client is decreasing and finally reaches to 0. In this situation new clients need to wait until a AUTHENTICATION METHODS 6.2.2. Clear Text Password Authentication. The method password sends the password in clear-text and is therefore vulnerable to password "sniffing" attacks. It should always be avoided if possible. If the connection is protected by SSL encryption then password can be used safely, though. For this sake, it is recommended to use hostssl in pool_hba.conf so that clients are enforced to use SSL TUTORIAL - PGPOOL WIKI This chapter explains how to get start with Pgpool-II.. Table of Contents 1. Getting Started 1.1. Installation 1.2. Your FirstReplication
AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
INSTALLING PGPOOL_RECOVERY 2.6. Installing pgpool_recovery. Pgpool-II need function of pgpool_recovery, pgpool_remote_start and pgpool_switch_xlog, when you use the online recovery that describes latter.Also pgpoolAdmin of management tool, stop, restart or reload a PostgreSQL on the screen by use pgpool_pgctl.It is enough, if these function installed intemplate1 first.
WATCHDOG - PGPOOL
use_watchdog (boolean) . If on, activates the watchdog. Default is off This parameter can only be set at server start. Pgpool-II 4.1 or earlier, because it is required to specify its own pgpool node information and the destination pgpool nodes information, the settings are different per pgpool node. Since Pgpool-II 4.2, all configuration parameters are identical on all hosts. ERROR REPORTING AND LOGGING This parameter can be changed by reloading the Pgpool-II configurations.. logging_collector (boolean) . This parameter enables the logging collector, which is a background process that captures log messages sent to stderr and redirects them into log files.ONLINE RECOVERY
Online recovery is performed in two phases. The first phase is called "first stage" and the second phase is called "second stage". Only native_replication_mode and snapshot_isolation_mode require the second stage. For other modes including streaming replication mode the second stage is not performed and you don't need to provide a script for the stage in recovery_2nd_stage_command. i.e. youPGPOOL-II TUTORIAL
In this tutorial, we will place three servers within the same host as pgpool-II, and assign 5432, 5433, 5434 port numbers respectively. To configure pgpool-II, edit pgpool.conf as follows. For backend_hostname, backend_port , backend_weight, set the node's hostname, port number, and ratio for load balancing. PGPOOL-II + WATCHDOG SETUP EXAMPLE Pgpool-II + Watchdog Setup Example. This section shows an example of streaming replication configuration using Pgpool-II. In this example, we use 3 Pgpool-II servers to manage PostgreSQL servers to create a robust cluster system and avoid the single point of failure or split brain. PostgreSQL 13 is used in this configuration example. AWS CONFIGURATION EXAMPLE So for this example, do the following steps: Launch two Linux Amazon EC2 instances. For this example, we name these instances as "instance-1" and "instance-2". Configure the security group for the instances and allow inbound traffic on ports used by pgpool-II and watchdog. Install the Pgpool-II on both instances. Allocate an ElasticIP address.
5.11. STREAMING REPLICATION CHECK 5.11. Streaming Replication Check. Pgpool-II can work with PostgreSQL native Streaming Replication, that is available since PostgreSQL 9.0. To configure Pgpool-II with streaming replication, enable master_slave_mode and set master_slave_sub_mode to 'stream'.. Pgpool-II assumes that Streaming Replication is configured with Hot Standby on PostgreSQL, which means that the standby databaseRELEASE 3.7.15
A.18.1. Changes. Doc: mention that ssl_ciphers only affects to TLS 1.2 and lower. (Tatsuo Ishii) Doc: Improve the description of wd_priority. (Bo Peng) Patch is provided by Kenichiro Tanaka. Add mention about hostssl/hostnossl to pool_hba.conf sample file. (Tatsuo Ishii) PGPOOL-II 4.2.3 DOCUMENTATION pgpool-II 4.2.3 Documentation The Pgpool Global Development Group. Copyright © 2003-2021 The Pgpool Global Development GroupONLINE RECOVERY
Online recovery is performed in two phases. The first phase is called "first stage" and the second phase is called "second stage". Only native_replication_mode and snapshot_isolation_mode require the second stage. For other modes including streaming replication mode the second stage is not performed and you don't need to provide a script for the stage in recovery_2nd_stage_command. i.e. you CONFIGURING PCP.CONF Configuring pcp.conf. Pgpool-II provides a interface for administrators to perform management operation, such as getting Pgpool-II status or terminating Pgpool-II processes remotely. pcp.conf is the user/password file used for authentication by this interface. All operation modes require the pcp.conf file toTESTING REPLICATION
Testing Replication. Let's test the replication functionality using a benchmark tool pgbench, which comes with the standard PostgreSQL installation. Type following to create the benchmark tables. $ pgbench -i -p 11000 test. To see if the replication works correctly, directly connect to the primary and the standby server to see if they returnSHOW POOL NODES
SHOW POOL_NODES displays the node id, the hostname, the port, the status, the weight (only meaningful if you use the load balancing mode), the role, the SELECT query counts issued to each backend, whether each node is the load balance node or not, the replication delay (only if in streaming replication mode) and last status changetime. In
MAIN PAGE
From pgpool Wiki
Jump to: navigation, searchCONTENTS
* 1 Welcome to Pgpool Wiki! * 1.1 What is Pgpool-II? * 1.2 Pgpool-II License * 1.3 Stable versions* 1.4 Contacts
* 2 What's new
* 2.1 News
* 2.1.1 Pgpool-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 and pgpoolAdmin 4.1.0 officially released (2020/02/20)* 2.2 Events
* 2.2.1 PGConf.ASIA 2019 in Bali * 2.2.2 PGConf.ASIA 2018 in Tokyo * 2.2.3 PGConf.ASIA 2017 in Tokyo * 2.2.4 PostgreSQL Conference in Russia 2016 * 2.2.5 PostgreSQL Conference in China 2015 * 2.2.6 pgCon 2015 Cluster Hacker Summit * 2.2.7 Pgpool-II Day 2015 in Tokyo* 2.3 New docs
* 2.3.1 pgpool-II 3.5 is coming soon!* 2.4 Stable
* 2.4.1 Pgpool-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 and pgpoolAdmin 4.1.0 officially released (2020/02/20) * 2.4.2 Pgpool-II 4.1.0, 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 RPMs Update 2 officially released (2019/11/19) * 2.4.3 Pgpool-II 4.1.0 released (2019/10/31) * 2.4.4 Pgpool-II 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 officially released (2019/10/31) * 2.4.5 Pgpool-II 4.0.6, 3.7.11, 3.6.18, 3.5.22 and 3.4.25 officially released (2019/08/15) * 2.4.6 Pgpool-II 4.0.5, 3.7.10, 3.6.17, 3.5.21 and 3.4.24 officially released (2019/05/16) * 2.4.7 Pgpool-II 4.0.4, 3.7.9, 3.6.16, 3.5.20 and 3.4.23 officially released (2019/03/29) * 2.4.8 Pgpool-II 4.0.3, 3.7.8, 3.6.15, 3.5.19 and 3.4.22 officially released (2019/02/21) * 2.4.9 pgpoolAdmin 4.0.1 officially released (2018/12/20) * 2.4.10 Pgpool-II 4.0.2, 3.7.7, 3.6.14, 3.5.18 and 3.4.21 officially released (2018/11/22) * 2.4.11 Pgpool-II 4.0.1, 3.7.6, 3.6.13, 3.5.17 and 3.4.20 officially released (2018/10/31) * 2.4.12 Pgpool-II 4.0.0 and pgpoolAdmin 4.0.0 officially released(2018/10/19)
* 2.4.13 Pgpool-II 3.7.5, 3.6.12, 3.5.16, 3.4.19 and 3.3.22 officially released (2018/07/31) * 2.4.14 Pgpool-II 3.7.4, 3.6.11, 3.5.15 and 3.4.18 officially released (2018/06/12) * 2.4.15 Pgpool-II 3.7.3, 3.6.10, 3.5.14, 3.4.17 and 3.3.21 officially released (2018/04/17) * 2.4.16 Pgpool-II 3.7.2-2 RPMs are released. (2018/03/14) * 2.4.17 Pgpool-II 3.7.2, 3.6.9, 3.5.13, 3.4.16 and 3.3.20 officially released (2018/02/13) * 2.4.18 pgpoolAdmin 3.7.1 officially released (2018/02/05) * 2.4.19 Pgpool-II 3.7.1, 3.6.8, 3.5.12, 3.4.15 and 3.3.19 officially released (2018/01/09) * 2.4.20 Pgpool-II 3.7.0 and pgpoolAdmin 3.7.0 officially released(2017/11/22)
* 2.4.21 Pgpool-II 3.6.7, 3.5.11, 3.4.14 and 3.3.18 officially released (2017/11/01) * 2.4.22 Pgpool-II 3.6.6, 3.5.10, 3.4.13, 3.3.17 and 3.2.22 officially released (2017/09/05) * 2.4.23 Pgpool-II 3.6.5, 3.5.9, 3.4.12, 3.3.16 and 3.2.21 officially released (2017/07/11) * 2.4.24 Pgpool-II 3.6.4, 3.5.8 officially released (2017/05/11) * 2.4.25 Pgpool-II 3.6.3, 3.5.7, 3.4.11, 3.3.15, 3.2.20 and pgpoolAdmin 3.6.1 officially released (2017/04/28) * 2.4.26 Pgpool-II 3.6.2, 3.5.6, 3.4.10, 3.3.14 and 3.2.19 officially released (2017/03/17) * 2.4.27 pgpoolAdmin 3.6.0 officially released (2017/02/28) * 2.4.28 pgpool-II 3.6.1, 3.5.5, 3.4.9, 3.3.13, 3.2.18 and 3.1.21 officially released (2016/12/26) * 2.4.29 pgpool-II 3.6.0 officially released (2016/11/21) * 2.4.30 pgpool-II 3.5.4, 3.4.8, 3.3.12, 3.2.17 and 3.1.20 officially released (2016/08/31) * 2.4.31 pgpool-II 3.5.3, 3.4.7, 3.3.11, 3.2.16, 3.1.19, and pgpoolAdmin 3.5.3 officially released (2016/06/17) * 2.4.32 pgpool-II 3.5.2, 3.4.6, 3.3.10, 3.2.15, 3.1.18, and pgpoolAdmin 3.5.2 officially released (2016/04/26) * 2.4.33 pgpool-II 3.5.1, 3.4.5, 3.3.9, 3.2.14, 3.1.17, and pgpoolAdmin 3.5.1 officially released (2016/04/04) * 2.4.34 pgpool-II 3.4.4, 3.3.8, 3.2.13, 3.1.16, and 3.0.20 officially released (2016/02/05) * 2.4.35 pgpool-II 3.5.0 and pgpoolAdmin 3.5.0 officially released(2016/01/29)
* 2.4.36 pgpool-II 3.4.3, 3.3.7, 3.2.12, 3.1.15, and 3.0.19 officially released (2015/07/24) * 2.4.37 pgpool-II 3.4.2, 3.3.6, 3.2.11, 3.1.14, and 3.0.18 officially released (2015/04/08) * 2.4.38 pgpool-II 3.4.1, 3.3.5, 3.2.10, 3.1.13, 3.0.17 and pgpoolAdmin 3.4.1 officially released (2015/02/05) * 2.4.39 The pgpool-II official yum repository released (2014/12/16) * 2.4.40 pgpool-II 3.4.0 and pgpoolAdmin 3.4.0 officially released(2014/11/07)
* 2.4.41 pgpool-II 3.3.4, 3.2.9, 3.1.12, and 3.0.16 are officially released (2014/09/05) * 2.4.42 pgpool-ha 2.2 released (2014/04/01) * 2.4.43 pgpool-II 3.3.3, 3.2.8, 3.1.11, 3.0.15 and pgpoolAdmin 3.3.1 officially released (2014/03/24) * 2.4.44 pgpool-II 3.2.7, 3.1.10, 3.0.14 officially released(2013/12/06)
* 2.4.45 pgpool-II 3.3.2 officially released (2013/11/29) * 2.4.46 pgpool-II 3.3.1, 3.2.6, 3.1.9, 3.0.13 officially released(2013/09/06)
* 2.4.47 Missing regression test suite in pgpool-II 3.3.0.tar.gz(2013/07/31)
* 2.4.48 pgpool-II 3.3 and pgpoolAdmin 3.3 officially released(2013/07/30)
* 2.4.49 pgpool-II 3.2.5, 3.1.8, 3.0.12 officially released(2013/07/10)
* 2.5 Development
* 2.5.1 Pgpool-II 4.1 RC1 released (2019/10/16) * 2.5.2 Pgpool-II 4.1 beta1 released (2019/09/06) * 2.5.3 Pgpool-II 4.0 RC1 released (2018/10/03) * 2.5.4 Pgpool-II 4.0 beta1 released (2018/09/19) * 2.5.5 Pgpool-II 4.0 alpha2 released (2018/09/06) * 2.5.6 Pgpool-II 4.0 alpha1 released (2018/08/20) * 2.5.7 Pgpool-II 3.7 RC1 and pgpoolAdmin 3.7 RC1 released(2017/11/13)
* 2.5.8 Pgpool-II 3.7 beta1 released (2017/10/17) * 2.5.9 pgpool-II 3.6 RC1 released (2016/11/16) * 2.5.10 pgpool-II 3.6 beta2 released (2016/11/08) * 2.5.11 pgpool-II 3.6 beta1 released (2016/11/02) * 2.5.12 Pgpool-II 3.6 alpha1 released (2016/10/19) * 2.5.13 pgpool-II 3.5 RC1 released (2016/1/14) * 2.5.14 pgpool-II 3.5 beta1 released (2015/12/14) * 2.5.15 pgpool-II 3.5 alpha1 released (2015/11/16) * 2.5.16 pgpool-II 3.3 RC1 released (2013/07/25) * 2.5.17 pgpool-II 3.3 beta1 released (2013/06/12) * 2.5.18 pgpool-II 3.3 alpha1 released (2013/05/17)* 2.6 Old
* 3 Where can I get commercial support for pgpool-II? WELCOME TO PGPOOL WIKI!WHAT IS PGPOOL-II?
Pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. It is licensed under BSD license. It provides the following features. * CONNECTION POOLING Pgpool-II saves connections to the PostgreSQL servers, and reuse them whenever a new connection with the same properties (i.e. username, database, protocol version) comes in. It reduces connection overhead, and improves system's overall throughput.* REPLICATION
Pgpool-II can manage multiple PostgreSQL servers. Using the replication function enables creating a realtime backup on 2 or more physical disks, so that the service can continue without stopping servers in case of a disk failure.* LOAD BALANCING
If a database is replicated, executing a SELECT query on any server will return the same result. Pgpool-II takes an advantage of the replication feature to reduce the load on each PostgreSQL server by distributing SELECT queries among multiple servers, improving system's overall throughput. At best, performance improves proportionally to the number of PostgreSQL servers. Load balance works best in a situation where there are a lot of users executing many queries at thesame time.
* LIMITING EXCEEDING CONNECTIONS There is a limit on the maximum number of concurrent connections with PostgreSQL, and connections are rejected after this many connections. Setting the maximum number of connections, however, increases resource consumption and affect system performance. pgpool-II also has a limit on the maximum number of connections, but extra connections will be queued instead of returning an error immediately.* WATCHDOG
Watchdog can coordinate multiple Pgpool-II, create a robust cluster system and avoid the single point of failure or split brain. Watchdog can perform lifecheck against other pgpool-II nodes, to detect a fault of Pgpoll-II. If active Pgpool-II goes down, standby Pgpool-II can be promoted to active, and take over Virtual IP. * IN MEMORY QUERY CACHE In memory query cache allows to save a pair of SELECT statement and its result. If an identical SELECTs comes in, Pgpool-II returns the value from cache. Since no SQL parsing nor access to PostgreSQL are involved, using in memory cache is extremely fast. On the other hand, it might be slower than the normal path in some cases, because it adds some overhead of storing cache data. Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with Pgpool-II almost without a Pgpool-II talks PostgreSQL's backend and frontend protocol, and relays a connection between them. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with Pgpool-II almost without a change to its sources.PGPOOL-II LICENSE
See License .
STABLE VERSIONS
* Pgpool-II: 4.0, 3.7, 3.6, 3.5, 3.4 * pgpoolAdmin: 4.0, 3.7, 3.6, 3.5, 3.4CONTACTS
* If you have technical questions regarding Pgpool-II, please subscribe Pgpool-II mailing listsand send
questions to it (pgpool-general will be a starter). Please DO NOT send technical questions via private email. We will not respond such thatmessages.
* If you believe that you found a vulnerability/security issues with Pgpool-II, please send a PRIVATE EMAIL to ishii at sraoss.co.jp (he is the project leader).WHAT'S NEW
NEWS
PGPOOL-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 AND PGPOOLADMIN 4.1.0 OFFICIALLY RELEASED (2020/02/20) Pgpool-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 and pgpoolAdmin 4.1.0officially released
You can download them here.
* 4.1.1 : English
Japanese
* 4.0.8 : English
Japanese
* 3.7.13 : English
Japanese
* 3.6.20 : English
Japanese
* 3.5.24 : English
Japanese
EVENTS
PGCONF.ASIA 2019 IN BALI Bo Peng is going to give a presentation Setup a High-Availability and Load Balancing PostgreSQL Cluster: New Features of Pgpool-II 4.1 at "PGConf.ASIA 2019" held in Bali from September 8th to 11st. PGCONF.ASIA 2018 IN TOKYO Tatsuo Ishii and Bo Peng are going to give a presentation Celebrating its 15th Anniversary Pgpool-II Past Present and Future Celebrating its 15th Anniversary Pgpool-II Past Present and Futurepart2
at "PGConf.ASIA 2018" held in Tokyo from December 10th to 12th. PGCONF.ASIA 2017 IN TOKYO Tatsuo Ishii is going to give a presentation "More reliability and support for PostgreSQL 10: Introducing Pgpool-II 3.7" at "PGConf.ASIA 2017" , held in Tokyo from December 4th to6th.
POSTGRESQL CONFERENCE IN RUSSIA 2016 Tatsuo gave a talk "How to manage a herd of elephants" at "PostgreSQL Conference in Russia 2016" , held in Moscow from February 4th to 5th. The slides are available in Developer'sdocumentation
.
POSTGRESQL CONFERENCE IN CHINA 2015 Tatsuo gave a talk "How to manage a herd of elephants" at "PostgreSQL Conference in China 2015" , held in Beijing from November 21th to 22th. The slides are available in Developer's documentation.
PGCON 2015 CLUSTER HACKER SUMMIT We participated "6th Postgres Cluster Hacker Summit" which was held as a part of PgCon 2015 Developer Unconference. We reported about Development Status Updates and pgpool-II 3.5 features. The slides are available in Developer's documentation.
PGPOOL-II DAY 2015 IN TOKYO We had the very first time pgpool-II decicated conference. See theevent report
.
NEW DOCS
PGPOOL-II 3.5 IS COMING SOON! pgpool-II 3.5 alpha1 has been out. Tatsuo introduces "new features ofpgpool-II 3.5."
STABLE
PGPOOL-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 AND PGPOOLADMIN 4.1.0 OFFICIALLY RELEASED (2020/02/20) Pgpool-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 and pgpoolAdmin 4.1.0officially released
You can download them here.
* 4.1.1 : English
Japanese
* 4.0.8 : English
Japanese
* 3.7.13 : English
Japanese
* 3.6.20 : English
Japanese
* 3.5.24 : English
Japanese
PGPOOL-II 4.1.0, 4.0.7, 3.7.12, 3.6.19, 3.5.23 AND 3.4.26 RPMS UPDATE 2 OFFICIALLY RELEASED (2019/11/19) Pgpool-II 4.1.0, 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 RPMs Update 2 are officially released. The updated RPM packages fixed the bug which logs are not output, when log_destination = 'syslog' isconfigured.
You can download them here.
PGPOOL-II 4.1.0 RELEASED (2019/10/31) Pgpool-II 4.1.0 is now relased. Major enhancements in Pgpool-II 4.1 include: * Statement level load balancing.* Auto failback.
* Enhance performance in number of areas. * Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs. * Have separate SQL parser for DML statements to eliminate unnecessary parsing effort. * Load balancing control for specific queries. * Reduce Internal Queries against System Catalogs. * Import PostgreSQL 12 SQL parser.* etc.
You can download it from here.
Release notes: EnglishJapanese
PGPOOL-II 4.0.7, 3.7.12, 3.6.19, 3.5.23 AND 3.4.26 OFFICIALLY RELEASED(2019/10/31)
Pgpool-II 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 officially released Please note that 3.4.26 is the last release of 3.4 series because 5 years has passed since 3.4 was out (2014/11). You can download them here.
* 4.0.7 : English
Japanese
* 3.7.12 : English
Japanese
* 3.6.19 : English
Japanese
* 3.5.23 : English
Japanese
* 3.4.26: English
Japanese
PGPOOL-II 4.0.6, 3.7.11, 3.6.18, 3.5.22 AND 3.4.25 OFFICIALLY RELEASED(2019/08/15)
Pgpool-II 4.0.6, 3.7.11, 3.6.18, 3.5.22 and 3.4.25 officially released You can download them here.
* 4.0.6 : English
Japanese
* 3.7.11 : English
Japanese
* 3.6.18 : English
Japanese
* 3.5.22 : English
Japanese
* 3.4.25: English
Japanese
PGPOOL-II 4.0.5, 3.7.10, 3.6.17, 3.5.21 AND 3.4.24 OFFICIALLY RELEASED(2019/05/16)
Pgpool-II 4.0.5, 3.7.10, 3.6.17, 3.5.21 and 3.4.24 officially released You can download them here.
* 4.0.5 : English
Japanese
* 3.7.10 : English
Japanese
* 3.6.17 : English
Japanese
* 3.5.21 : English
Japanese
* 3.4.24: English
Japanese
PGPOOL-II 4.0.4, 3.7.9, 3.6.16, 3.5.20 AND 3.4.23 OFFICIALLY RELEASED(2019/03/29)
Pgpool-II 4.0.4, 3.7.9, 3.6.16, 3.5.20 and 3.4.23 officially released You can download them here.
* 4.0.4 : English
Japanese
* 3.7.9 : English
Japanese
* 3.6.16 : English
Japanese
* 3.5.20 : English
Japanese
* 3.4.23: English
Japanese
PGPOOL-II 4.0.3, 3.7.8, 3.6.15, 3.5.19 AND 3.4.22 OFFICIALLY RELEASED(2019/02/21)
Pgpool-II 4.0.3, 3.7.8, 3.6.15, 3.5.19 and 3.4.22 officially released You can download them here.
* 4.0.3 : English
Japanese
* 3.7.8 : English
Japanese
* 3.6.15 : English
Japanese
* 3.5.19 : English
Japanese
* 3.4.22: English
Japanese
PGPOOLADMIN 4.0.1 OFFICIALLY RELEASED (2018/12/20) PgPool Global Development Group has released a Security Update ofpgpoolAdmin.
The purpose of this release is to address CVE-2018-16203, which allow an attacker to login without properly checking the authorization. Once getting into gpoolAdmin, the attacker can control Pgpool-II. Also it may be possible to obtain the superuser role of a PostgreSQL database. This vulnability affects all versions of pgpoolAdmin. We recommend upgrade pgpoolAdmin to 4.0.1 immediately (remember that PgpoolAdmin 4.0.1 is compatible with Pgpool-II 3.4 or later). PgPool Global Development Group would like to thank Fotios Rogkotis of DarkMatter for finding the security issue and giving us the detailedstudies on it.
You can download them here.
PGPOOL-II 4.0.2, 3.7.7, 3.6.14, 3.5.18 AND 3.4.21 OFFICIALLY RELEASED(2018/11/22)
Pgpool-II 4.0.2, 3.7.7, 3.6.14, 3.5.18 and 3.4.21 officially released You can download them here.
* 4.0.2 : English
Japanese
* 3.7.7 : English
Japanese
* 3.6.14 : English
Japanese
* 3.5.18 : English
Japanese
* 3.4.21: English
Japanese
PGPOOL-II 4.0.1, 3.7.6, 3.6.13, 3.5.17 AND 3.4.20 OFFICIALLY RELEASED(2018/10/31)
Pgpool-II 4.0.1, 3.7.6, 3.6.13, 3.5.17 and 3.4.20 officially released You can download them here.
* 4.0.1 : English
Japanese
* 3.7.6 : English
Japanese
* 3.6.13 : English
Japanese
* 3.5.17 : English
Japanese
* 3.4.20: English
Japanese
PGPOOL-II 4.0.0 AND PGPOOLADMIN 4.0.0 OFFICIALLY RELEASED (2018/10/19) Pgpool-II 4.0.0 and pgpoolAdmin 4.0.0 are now relased. V4.0 has new features: * Add SCRAM and Certificate authentication support. * Detecting "false" primary server of PostgreSQL. * Improvements to load balancing: * More load balancing fine control after write queries. * Load balancing control for specific queries. * Allow to specify load balance weight ratio for load balanceparameters.
* Add last state change timestamp to SHOW POOL NODES. * Import PostgreSQL 11 SQL parser. * Logging client messages.* etc.
You can download it from here.
Release notes: EnglishJapanese
PGPOOL-II 3.7.5, 3.6.12, 3.5.16, 3.4.19 AND 3.3.22 OFFICIALLY RELEASED(2018/07/31)
Pgpool-II 3.7.5, 3.6.12, 3.5.16, 3.4.19 and 3.3.22 officially released You can download them here.
* 3.7.5 : English
Japanese
* 3.6.12 : English
Japanese
* 3.5.16 : English
Japanese
* 3.4.19: English
Japanese
* 3.3.22: English
Japanese
Please note that 3.3.22 is the last release of 3.3 series because 5 years has passed since 3.3 was out (2013/07/30). PGPOOL-II 3.7.4, 3.6.11, 3.5.15 AND 3.4.18 OFFICIALLY RELEASED(2018/06/12)
Pgpool-II 3.7.4, 3.6.11, 3.5.15 and 3.4.18 officially released You can download them here.
* 3.7.4 : English
Japanese
* 3.6.11 : English
Japanese
* 3.5.15 : English
Japanese
* 3.4.18: English
Japanese
PGPOOL-II 3.7.3, 3.6.10, 3.5.14, 3.4.17 AND 3.3.21 OFFICIALLY RELEASED(2018/04/17)
Pgpool-II 3.7.3, 3.6.10, 3.5.14, 3.4.17 and 3.3.21 officially released You can download them here.
* 3.7.3 : English
Japanese
* 3.6.10 : English
Japanese
* 3.5.14 : English
Japanese
* 3.4.17: English
Japanese
* 3.3.21: English
Japanese
PGPOOL-II 3.7.2-2 RPMS ARE RELEASED. (2018/03/14) Pgpool-II 3.7.2-2 RPMs are released. You can download them here.
PGPOOL-II 3.7.2, 3.6.9, 3.5.13, 3.4.16 AND 3.3.20 OFFICIALLY RELEASED(2018/02/13)
Pgpool-II 3.7.2, 3.6.9, 3.5.13, 3.4.16 and 3.3.20 officially released You can download them here.
* 3.7.2 : English
Japanese
* 3.6.9 : English
Japanese
* 3.5.13 : English
Japanese
* 3.4.16: English
Japanese
* 3.3.20: English
Japanese
PGPOOLADMIN 3.7.1 OFFICIALLY RELEASED (2018/02/05) pgpoolAdmin 3.7.1 is officially released. You can download them here.
Release notes
PGPOOL-II 3.7.1, 3.6.8, 3.5.12, 3.4.15 AND 3.3.19 OFFICIALLY RELEASED(2018/01/09)
Pgpool-II 3.7.1, 3.6.8, 3.5.12, 3.4.15 and 3.3.19 officially released You can download them here.
* 3.7.1 : English
Japanese
* 3.6.8 : English
Japanese
* 3.5.12 : English
Japanese
* 3.4.15: English
Japanese
* 3.3.19: English
Japanese
PGPOOL-II 3.7.0 AND PGPOOLADMIN 3.7.0 OFFICIALLY RELEASED (2017/11/22) Pgpool-II 3.7.0 and pgpoolAdmin 3.7.0 are now relased. V3.7 has new features: * Quorum aware failover feature. * Allow specifying the hostnames in pool_hba. * Allow to specify per node health check parameters. * Support AWS Aurora. * Import PostgreSQL 10 SQL parser. * Support logical replication.* etc.
You can download them here.
Release notes: EnglishJapanese
PGPOOL-II 3.6.7, 3.5.11, 3.4.14 AND 3.3.18 OFFICIALLY RELEASED(2017/11/01)
Pgpool-II 3.6.7, 3.5.11, 3.4.14 and 3.3.18 officially released You can download them here.
* 3.6.7 : English
Japanese
* 3.5.11 : English
Japanese
* 3.4.14: English
Japanese
* 3.3.18: English
Japanese
PGPOOL-II 3.6.6, 3.5.10, 3.4.13, 3.3.17 AND 3.2.22 OFFICIALLY RELEASED(2017/09/05)
Pgpool-II 3.6.6, 3.5.10, 3.4.13, 3.3.17, 3.2.22 and pgpoolAdmin 3.6.2officially released
You can download them here.
* 3.6.6 : English
Japanese
* 3.5.10 : English
Japanese
* 3.4.13: English
Japanese
* 3.3.17: English
Japanese
* 3.2.22: English
Japanese
PGPOOL-II 3.6.5, 3.5.9, 3.4.12, 3.3.16 AND 3.2.21 OFFICIALLY RELEASED(2017/07/11)
Pgpool-II 3.6.5, 3.5.9, 3.4.12, 3.3.16 and 3.2.21 officially released You can download them here.
* 3.6.5 : English
Japanese
* 3.5.9 : English
Japanese
* 3.4.12: English
Japanese
* 3.3.16: English
Japanese
* 3.2.21: English
Japanese
PGPOOL-II 3.6.4, 3.5.8 OFFICIALLY RELEASED (2017/05/11) Pgpool-II 3.6.4, 3.5.8 officially released You can download them here.
* 3.6.4: English
Japanese
* 3.5.8: English
Japanese
PGPOOL-II 3.6.3, 3.5.7, 3.4.11, 3.3.15, 3.2.20 AND PGPOOLADMIN 3.6.1 OFFICIALLY RELEASED (2017/04/28) Pgpool-II 3.6.3, 3.5.7, 3.4.11, 3.3.15, 3.2.20 and pgpoolAdmin 3.6.1officially released
You can download them here.
* 3.6.3: English
Japanese
* 3.5.7: English
Japanese
* 3.4.11: English
Japanese
* 3.3.15: English
Japanese
* 3.2.20: English
Japanese
PGPOOL-II 3.6.2, 3.5.6, 3.4.10, 3.3.14 AND 3.2.19 OFFICIALLY RELEASED(2017/03/17)
Pgpool-II 3.6.2, 3.5.6, 3.4.10, 3.3.14 and 3.2.19 officially released You can download them here.
* 3.6.2: English
Japanese
* 3.5.6: English
Japanese
* 3.4.10: English
Japanese
* 3.3.14: English
Japanese
* 3.2.19: English
Japanese
PGPOOLADMIN 3.6.0 OFFICIALLY RELEASED (2017/02/28) pgpoolAdmin 3.6.0 is officially released. You can download them here.
PGPOOL-II 3.6.1, 3.5.5, 3.4.9, 3.3.13, 3.2.18 AND 3.1.21 OFFICIALLY RELEASED (2016/12/26) These are the latest stable versions of each major branches. You can download them here.
* 3.6.1: English
Japanese
* 3.5.5: English
Japanese
* 3.4.9: English
Japanese
* 3.3.13: English
Japanese
* 3.2.18: English
Japanese
* 3.1.21: English
Japanese
pgpool-II 3.1.21 is the final release of the 3.1.x. This series has reached "End of Life", and is no longer maintained and does not receive any updates. PGPOOL-II 3.6.0 OFFICIALLY RELEASED (2016/11/21) Pgpool-II 3.6.0 is now officially released. You can download them here.
V3.6's new features are: * Improve the behavior of fail-over. * New PGPOOL SET command has been introduced. * Watchdog is significantly enhanced. * Handling of extended query protocol (e.g. used by Java applications) in streaming replication mode speeds up if many rows are returned in a result set. * Import parser of PostgreSQL 9.6. * In some cases pg_terminate_backend() now does not trigger afail-over.
* Change documentation format from raw HTML to SGML.* etc.
PGPOOL-II 3.5.4, 3.4.8, 3.3.12, 3.2.17 AND 3.1.20 OFFICIALLY RELEASED(2016/08/31)
These are the latest stable versions of each major branches. You can download them here.
* 3.5.4: English
Japanese
* 3.4.8: English
Japanese
* 3.3.12: English
Japanese
* 3.2.17: English
Japanese
* 3.1.20: English
Japanese
PGPOOL-II 3.5.3, 3.4.7, 3.3.11, 3.2.16, 3.1.19, AND PGPOOLADMIN 3.5.3 OFFICIALLY RELEASED (2016/06/17) These are the latest stable versions of each major branches. You can download them here.
* 3.5.3: English
Japanese
* 3.4.7: English
Japanese
* 3.3.11: English
Japanese
* 3.2.16: English
Japanese
* 3.1.19: English
Japanese
PGPOOL-II 3.5.2, 3.4.6, 3.3.10, 3.2.15, 3.1.18, AND PGPOOLADMIN 3.5.2 OFFICIALLY RELEASED (2016/04/26) These are the latest stable versions of each major branches. You can download them here.
* 3.5.2: English
Japanese
* 3.4.6: English
Japanese
* 3.3.10: English
Japanese
* 3.2.15: English
Japanese
* 3.1.18: English
Japanese
PGPOOL-II 3.5.1, 3.4.5, 3.3.9, 3.2.14, 3.1.17, AND PGPOOLADMIN 3.5.1 OFFICIALLY RELEASED (2016/04/04) These are the latest stable versions of each major branches. You can download them here.
* 3.5.1: English
Japanese
* 3.4.5: English
Japanese
* 3.3.9: English
Japanese
* 3.2.14: English
Japanese
* 3.1.17: English
Japanese
PGPOOL-II 3.4.4, 3.3.8, 3.2.13, 3.1.16, AND 3.0.20 OFFICIALLY RELEASED(2016/02/05)
These are the latest stable versions of each major branches. You can download them here.
* 3.4.4: English
Japanese
* 3.3.8: English
Japanese
* 3.2.13: English
Japanese
* 3.1.16: English
Japanese
* 3.0.20: English
Japanese
pgpool-II 3.0.20 is the final release of the 3.0.x. This series has reached "End of Life", and is no longer maintained and does not receive any updates. PGPOOL-II 3.5.0 AND PGPOOLADMIN 3.5.0 OFFICIALLY RELEASED (2016/01/29) Pgpool-II 3.5.0 and pgpoolAdmin 3.5.0 are now officially released. You can download them here.
V3.5's new features are: * Improved performance in extended query protocol * Overcoming the thundering herd problem * watchdog feature enhancements to be more robust and adaptable * PCP command enhancements * Import PostgreSQL 9.5 parser* etc.
Please see this
for details.
3.5.0 release note: EnglishJapanese
PGPOOL-II 3.4.3, 3.3.7, 3.2.12, 3.1.15, AND 3.0.19 OFFICIALLY RELEASED(2015/07/24)
These are the latest stable versions of each major branches. You can download them here.
* 3.4.3: English
Japanese
* 3.3.7: English
Japanese
* 3.2.12: English
Japanese
* 3.1.15: English
Japanese
* 3.0.19: English
Japanese
PGPOOL-II 3.4.2, 3.3.6, 3.2.11, 3.1.14, AND 3.0.18 OFFICIALLY RELEASED(2015/04/08)
These are the latest stable versions of each major branches. You can download them here.
* 3.4.2: English
Japanese
* 3.3.6: English
Japanese
* 3.2.11: English
Japanese
* 3.1.14: English
Japanese
* 3.0.18: English
Japanese
PGPOOL-II 3.4.1, 3.3.5, 3.2.10, 3.1.13, 3.0.17 AND PGPOOLADMIN 3.4.1 OFFICIALLY RELEASED (2015/02/05) These are the latest stable versions of each major branches. You can download them here.
* 3.4.1: English
Japanese
* 3.3.5: English
Japanese
* 3.2.10: English
Japanese
* 3.1.13: English
Japanese
* 3.0.17: English
Japanese
* pgpoolAdmin 3.4.1: English THE PGPOOL-II OFFICIAL YUM REPOSITORY RELEASED (2014/12/16) PgPool Global Development Group announced the pgpool-II official yum repository. With this repository, you will be able to install or update pgpool-II and pgpoolAdmin etc. by using yum. http://www.pgpool.net/yum/ The yum repository currently supports pgpool-II 3.3 or above withRHEL6 x86_64.
See Yum Repository for detail. PGPOOL-II 3.4.0 AND PGPOOLADMIN 3.4.0 OFFICIALLY RELEASED (2014/11/07) Pgpool-II 3.4.0 is now officially released. You can download them here.
V3.4's new features are: * Allow fine control of load balancing by using application name ordatabase name
* New features about log output * Allow to print pgpool-II process names * Allow to control log verbosity like PostgreSQL * SQL parser compatible with PostgreSQL 9.4 * Import PostgreSQL's memory manager and exception manager * Support IPv6 address * Reorganize source code tree* etc.
* 3.4.0 release note: EnglishJapanese
PGPOOL-II 3.3.4, 3.2.9, 3.1.12, AND 3.0.16 ARE OFFICIALLY RELEASED(2014/09/05)
These are the latest stable versions of each major branches. You can download them here.
* 3.3.4: English
Japanese
* 3.2.9: English
Japanese
* 3.1.12: English
Japanese
* 3.0.16: English
Japanese
PGPOOL-HA 2.2 RELEASED (2014/04/01) This is the latest stable version. You can download them here.
PGPOOL-II 3.3.3, 3.2.8, 3.1.11, 3.0.15 AND PGPOOLADMIN 3.3.1 OFFICIALLY RELEASED (2014/03/24) These are the latest stable versions of each major branches. You can download them here.
* 3.3.3: English
Japanese
* 3.2.8: English
Japanese
* 3.1.11: English
Japanese
* 3.0.15: English
Japanese
* pgpoolAdmin 3.3.1: English PGPOOL-II 3.2.7, 3.1.10, 3.0.14 OFFICIALLY RELEASED (2013/12/06) These are the latest stable versions of each major branches. You can download them here.
* 3.2.7: English
Japanese
* 3.1.10: English
Japanese
* 3.0.14: English
Japanese
PGPOOL-II 3.3.2 OFFICIALLY RELEASED (2013/11/29) These are the latest stable version of 3.3. You can download them here.
* 3.3.2: English
Japanese
PGPOOL-II 3.3.1, 3.2.6, 3.1.9, 3.0.13 OFFICIALLY RELEASED (2013/09/06) These are the latest stable versions of each major branches. You can download them here.
MISSING REGRESSION TEST SUITE IN PGPOOL-II 3.3.0.TAR.GZ (2013/07/31) New regression test suite was not accidentally included in the pgpool-II 3.3.0.tar.gz tar ball. You can get it from git repository ordownload from here
.
PGPOOL-II 3.3 AND PGPOOLADMIN 3.3 OFFICIALLY RELEASED (2013/07/30) Pgpool-II 3.3 is now officially released. You can download them here.
V3.3's new features are: * Enhancements for watchdog * New monitoring method of watchdog lifecheck using heartbeat signal * Interlocking of failover/failback script * Secure watchdog communication * PCP command for retrieving the watchdog status* etc.
* Othres
* Import PostgreSQL 9.2 raw parser * New pgpool_setup tool * Support for using CREATE EXTENSION to install pgpool specificextensions
* regression test suit* etc.
* pgpool-II 3.3 release note (English) * pgpool-II 3.3 release note (Japanese) PGPOOL-II 3.2.5, 3.1.8, 3.0.12 OFFICIALLY RELEASED (2013/07/10) These are the latest stable versions of each major branches. You can download them here.
DEVELOPMENT
PGPOOL-II 4.1 RC1 RELEASED (2019/10/16) Pgpool-II 4.1 RC1 is now relased. This is not intended to be used in production but is close to the release version. So users are encouraged to test it out. Major enhancements in Pgpool-II 4.1 include: * Statement level load balancing.* Auto failback.
* Enhance performance in number of areas. * Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs. * Have separate SQL parser for DML statements to eliminate unnecessary parsing effort. * Load balancing control for specific queries. * Reduce Internal Queries against System Catalogs. * Import PostgreSQL 12 SQL parser.* etc.
You can download it from here.
Release notes: English PGPOOL-II 4.1 BETA1 RELEASED (2019/09/06) Pgpool-II 4.1 beta1 is now relased. This is not a stable version but just for developers. Major enhancements in Pgpool-II 4.1 include: * Statement level load balancing.* Auto failback.
* Enhance performance in number of areas. * Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs. * Have separate SQL parser for DML statements to eliminate unnecessary parsing effort. * Load balancing control for specific queries. * Reduce Internal Queries against System Catalogs. * Import PostgreSQL 12 SQL parser.* etc.
You can download it from here.
Release notes: English PGPOOL-II 4.0 RC1 RELEASED (2018/10/03) Pgpool-II 4.0 RC1 is now relased. This is not intended to be used in production but is close to the release version. So users are encouraged to test it out. V4.0 has new features: * Add SCRAM and Certificate authentication support. * Detecting "false" primary server of PostgreSQL. * Improvements to load balancing: * More load balancing fine control after write queries. * Load balancing control for specific queries. * Allow to specify load balance weight ratio for load balanceparameters.
* Add last state change timestamp to SHOW POOL NODES. * Import PostgreSQL 11 SQL parser. * Logging client messages.* etc.
You can download it from here.
Release notes: English PGPOOL-II 4.0 BETA1 RELEASED (2018/09/19) Pgpool-II 4.0 beta1 is now relased. This is not a stable version but just for developers. V4.0 has new features: * Add SCRAM and Certificate authentication support. * Detecting "false" primary server of PostgreSQL. * Improvements to load balancing: * More load balancing fine control after write queries. * Load balancing control for specific queries. * Allow to specify load balance weight ratio for load balanceparameters.
* Add last state change timestamp to SHOW POOL NODES. * Import PostgreSQL 11 SQL parser. * Logging client messages.* etc.
You can download it from here.
Release notes: English PGPOOL-II 4.0 ALPHA2 RELEASED (2018/09/06) Pgpool-II 4.0 alpha2 is now relased. This is not a stable version but just for developers. V4.0 has new features: * Add SCRAM and Certificate authentication support. * Detecting "false" primary server of PostgreSQL. * Improvements to load balancing: * More load balancing fine control after write queries. * Load balancing control for specific queries. * Allow to specify load balance weight ratio for load balanceparameters.
* Add last state change timestamp to SHOW POOL NODES. * Import PostgreSQL 11 SQL parser. * Logging client messages.* etc.
You can download it from here.
Release notes: English PGPOOL-II 4.0 ALPHA1 RELEASED (2018/08/20) Pgpool-II 4.0 alpha1 is now relased. This is not a stable version but just for developers. V4.0 has new features: * Add SCRAM and Certificate authentication support. * Detecting "false" primary server of PostgreSQL. * Improvements to load balancing: * More load balancing fine control after write queries. * Load balancing control for specific queries. * Allow to specify load balance weight ratio for load balanceparameters.
* Add last state change timestamp to SHOW POOL NODES. * Logging client messages.* etc.
You can download it from here.
Release notes: English PGPOOL-II 3.7 RC1 AND PGPOOLADMIN 3.7 RC1 RELEASED (2017/11/13) Pgpool-II 3.7 RC1 and pgpoolAdmin 3.7 RC1 are now relased. This is not intended to be used in production but is close to the release version. So users are encouraged to test it out. V3.7 has new features: * Quorum aware failover feature. * Allow specifying the hostnames in pool_hba. * Allow to specify per node health check parameters. * Support AWS Aurora. * Import PostgreSQL 10 SQL parser. * Support logical replication.* etc.
You can download it from here.
Release notes: EnglishJapanese
PGPOOL-II 3.7 BETA1 RELEASED (2017/10/17) Pgpool-II 3.7 beta1 is now relased. This is not a stable version but just for developers. V3.7 has new features: * Quorum aware failover feature. * Allow specifying the hostnames in pool_hba. * Allow to specify per node health check parameters. * Support AWS Aurora. * Import PostgreSQL 10 SQL parser. * Support logical replication.* etc.
You can download it from here.
PGPOOL-II 3.6 RC1 RELEASED (2016/11/16) pgpool-II 3.6 RC1 is now relased. This is not a stable version but just for developers. You can download it from here.
PGPOOL-II 3.6 BETA2 RELEASED (2016/11/08) pgpool-II 3.6 beta2 is now relased. This is not a stable version but just for developers. Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.6 better! You can download it from here.
PGPOOL-II 3.6 BETA1 RELEASED (2016/11/02) pgpool-II 3.6 beta1 is now relased. This is not a stable version but just for developers. Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.6 better! You can download it from here.
PGPOOL-II 3.6 ALPHA1 RELEASED (2016/10/19) Pgpool-II 3.6 alpha1 is now relased. This is not a stable version but just for developers. V3.6 has a new feature: * Improve the behavior of fail-over. * New PGPOOL SET command has been introduced. * Watchdog is significantly enhanced. * Handling of extended query protocol (e.g. used by Java applications) in streaming replication mode speeds up if many rows are returned in a result set. * Import parser of PostgreSQL 9.6. * In some cases pg_terminate_backend() now does not trigger afail-over.
* Change documentation format from raw HTML to SGML.* etc.
You can download it from here.
PGPOOL-II 3.5 RC1 RELEASED (2016/1/14) pgpool-II 3.5 RC1 and pgpoolAdmin 3.5 RC1 are now relased. This is not a stable version but just for developers. You can download it from here.
PGPOOL-II 3.5 BETA1 RELEASED (2015/12/14) pgpool-II 3.5 beta1 and pgpoolAdmin 3.5 beta1 are now relased. This is not a stable version but just for developers. Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.5 better! You can download it from here.
PGPOOL-II 3.5 ALPHA1 RELEASED (2015/11/16) Pgpool-II 3.5 alpha1 is now relased. This is not a stable version but just for developers. V3.5 has a new feature: * Improved performance in extended query protocol * Overcoming the thundering herd problem * watchdog feature enhancements to be more robust and adaptable * PCP command enhancements * Import PostgreSQL 9.5 parser* etc.
You can download it from here.
PGPOOL-II 3.3 RC1 RELEASED (2013/07/25) Pgpool-II 3.3 RC1 is now relased. This is not a stable version but just for developers. You can download it from here.
PGPOOL-II 3.3 BETA1 RELEASED (2013/06/12) Pgpool-II 3.3 beta1 is now relased. This is not a stable version but just for developers. Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.3 better! You can download it from here.
PGPOOL-II 3.3 ALPHA1 RELEASED (2013/05/17) Pgpool-II 3.3 alpha1 is now relased. This is not a stable version but just for developers. V3.3 has a new feature: * Enhancements for watchdog * New monitoring method of watchdog lifecheck using heartbeat signal * Interlocking of failover/failback script * Secure watchdog communication* etc.
* Othres
* Import PostgreSQL 9.2 raw parser * New pgpool_setup tool * Support for using CREATE EXTENSION to install pgpool specificextensions
You can download it from here.
OLD
See this page .
WHERE CAN I GET COMMERCIAL SUPPORT FOR PGPOOL-II? Some commercial packages include pgpool-II support. Consulting and annual support can be purchased from SRA OSS, Inc. Japan (http://www.sraoss.co.jp/index_en.php).Retrieved from
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