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So I turned
USER-DEFINED SCALAR FUNCTIONS SUCK The performance of scalar functions sucks hard. Let’s see it in action using the Stack Overflow database – any size will work. I’ll set things up first in case you want to follow along: I’m purposely setting my Cost Threshold for Parallelism to be low here because I want to demonstratewhat happens when
HOW TO FIX THE ERROR "STRING OR BINARY DATA WOULD BE Another way you could fix it is to upgrade your database’s compatibility level to 2019+ (150+), but that causes a whole bunch of other things to take effect too, like adaptive memory grants, and it’s going to require a whole lot more testing with your code. BRENT OZAR UNLIMITED I’m a SQL Server consultant. I specialize in performance tuning emergencies. In my 2-day SQL Critical Care®, we quickly assess your application’s performance, determine the root cause of the slowdowns, and then get everyone on the same page for permanent pain relief.. I also offer remote DBA services for SQL Server, performance tuning, and I do so many upgrades and migrations that when HOW TO UPGRADE SQL SERVER EVALUATION EDITION Brent Ozar, a legend is you. The biggest thing for sure was having to set the clock back — why the frog Microsoft didn’t throw a tiny routine in there to pop up and say “hey bud I can’t even upgrade because I can’t start the service because you’re past the evaluation deadline” is, well, I can’t say it’s beyond me since I’m well aware of how little they value the user DOWNLOAD THE CURRENT STACK OVERFLOW DATABASE FOR FREE Stack Overflow, the place where most of your production code comes from, publicly exports their data every couple/few months. @TarynPivots (their DBA) tweets about it, and then I pull some levers and import the XML data dump into SQL Server format. Stack Overflow’s database makes for great blog post examples because it’s real-world data: real data DEADLOCKS: LET’S DO ONE, UNDERSTAND IT, AND You keep getting warnings and emails about deadlocks, but let’s be honest: you’re not really sure how they happen or what to do about it. I’ll show you how to build a deadlock in just a few lines of T-SQL so you can see how SQL Server reacts. You’ll be more comfortable with the decisions SP_BLITZCACHE®: FREE SQL SERVER PLAN CACHE ANALYSIS SCRIPT Download it in our free First Responder Kit.. Common sp_BlitzCache parameters @SortOrder – find the worst queries sorted by reads, CPU, duration, executions, memory grant, or WHAT IS THE SQL SERVER CEIP SERVICE? The CEIP Service is the Customer Experience Improvement Program that sends telemetry data back to Microsoft. When you install Microsoft SQL Server, the CEIP Service is installed too. YOU CAN DISABLE PARAMETER SNIFFING. YOU PROBABLY SHOULDN'T During my parameter sniffing classes, people get a little exasperated with the complexity of the problem. Parameter sniffing is totally hard. I get it. At some level, it’d be great to just hit a magic button and make the whole thing go away. So inevitably, somebody will ask, “What about the database-level setting called Parameter INTRODUCING SP_BLITZLOCK: FOR TROUBLESHOOTING SQL SERVER Deadlocks are hard Especially when there are a lot of them. When there are dozens or more, looking at each graph is a pain. I had a script written that parsed out the XML, but really, having a folder full of random scripts is for old people. Like Twitter and reverse mortgages.So I turned
USER-DEFINED SCALAR FUNCTIONS SUCK The performance of scalar functions sucks hard. Let’s see it in action using the Stack Overflow database – any size will work. I’ll set things up first in case you want to follow along: I’m purposely setting my Cost Threshold for Parallelism to be low here because I want to demonstratewhat happens when
HOW TO FIX THE ERROR "STRING OR BINARY DATA WOULD BE Another way you could fix it is to upgrade your database’s compatibility level to 2019+ (150+), but that causes a whole bunch of other things to take effect too, like adaptive memory grants, and it’s going to require a whole lot more testing with your code. HOW TO PATCH SQL SERVER Microsoft releases SQL Server Cumulative Updates about every 60 days. This is a part of your job that you’re going to be doing a lot, so let’s get good at it! Here’s the strategy I like to use. Pick what patch you’re going to apply. Generally speaking, you should be on the most recent CumulativePASTE THE PLAN
Consulting. Performance Tuning; Remote DBA Services; Upgrades and Migrations; Consultant Toolkit; Training. Watch Brent Streaming Live; My Videos and Downloads SP_BLITZCACHE®: FREE SQL SERVER PLAN CACHE ANALYSIS SCRIPT Download it in our free First Responder Kit.. Common sp_BlitzCache parameters @SortOrder – find the worst queries sorted by reads, CPU, duration, executions, memory grant, orSP_BLITZINDEX®
Download it in our free First Responder Kit.. Common sp_BlitzIndex® Parameters @GetAllDatabases = 1 – runs index tests across all of the databases on the server instead of just your current database context. MY LIVE STREAMING SETUP FOR 2021: ICELAND EDITION Erika and I moved to Iceland for a while. For those of you who don’t follow my personal blog, here’s why we moved, and how we got here with a teleworker visa. You can spy on our adventures via my Instagram, Facebook, or Twitter. We’re working half the time while we live here, and sightseeing theSP_ALLNIGHTLOG
You manage a SQL Server instance with hundreds or thousands of mission-critical databases. You want to back them all up as quickly as possible, and one maintenance plan job isn’t going to cut it. You also want to protect those databases by restoring them as quickly as possible somewhere else – maybe nearby, or maybe WHY FULL TEXT'S CONTAINS QUERIES ARE SO SLOW SQL Server’s full text search is amazing. Well, it amazes me at least – it has so many cool capabilities: looking for prefixes, words near each other, different verb tenses, and even thesaurus searches. However, that’s not how I see most people using it: I’ve seen so many shops using it for matching specific strings,TRIVIAL PLANS
sp_BlitzCache™ Result: Trivial Execution Plans Trivial Plans occur when a query is so simple, there’s no reason for SQL Server to optimize the statement. Think of something like SELECT * FROM dbo.Users WHERE UserId = 1. When UserID is the clustered key, there’s nothing to do apart from seek to that record and return thedata. Normally,
HOW TO MOVE TEMPDB TO ANOTHER DRIVE & FOLDER Every time I have to do this, I Google for a script. I might as well write my own and put it here so at least I find myself in the Google results: The results: I can then copy/paste the results into SSMS, edit them, and run ’em. I like generating scripts like this HOW TO FIX THE ERROR "STRING OR BINARY DATA WOULD BE Another way you could fix it is to upgrade your database’s compatibility level to 2019+ (150+), but that causes a whole bunch of other things to take effect too, like adaptive memory grants, and it’s going to require a whole lot more testing with your code.__
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HI. I’M BRENT OZAR. I make Microsoft SQL Server go faster. I got my start in the late 1990s – first as a developer and systems administrator, then as a full time DBA. I’ve managed performance and reliability for truly tough servers: tens of terabytes, thousands of databases, thousands ofqueries per second.
I’m one of the rare Microsoft Certified Masters, and I’ve taught at conferences around the world including the PASS Summit, SQLbits, SQL Intersections, and Microsoft Ignite. My clients have included Stack Overflow, Google, and other companies whose SQL Servers you relyon every day.
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Uh, I mean, poison relief, I guess. How urgent and painful are your SQL Server problems? My training classes teach you how to make your SQL Server go faster. Sign up for a live class, or watch a recorded one at your own pace. I’ve even got a Live ClassSeason Pass
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help with your long term growth. My SQL ConstantCare® gathers data about your servers daily, then sends concise, easy-to-understand instructions on what you should fix next. Expensive? No, it’s just one flat per-user price to monitor all yourservers.
Haven’t got time for the pain? Need to figure out if it’s a code problem or a server problem, fast? In my 2-day SQL Critical Care®, we work together
remotely to get you long-term relief quickly and get everyone on thesame page.
ENOUGH ABOUT ME.
LET’S TALK ABOUT YOU. You’re storing data in Microsoft SQL Server, and you’re frustrated. It seems like a black box, and when you ask for data, it’s not coming in and out of the box fast enough. The box is yelling out an awful lot of error messages, too. You’ve tried Googling for answers, but there’s so much conflicting advice out there. You keep coming across BrentOzar.com over and over again in the results, though, and you’re starting to think that maybe – just maybe – this site has a few answers. (Some of them might even be correct!) LET’S GET YOU STARTED FREE. Download my free First Responder Kit packed with useful scripts like sp_Blitz, sp_BlitzCache, and sp_BlitzIndex. Then, attend my free online webcasts where I teach you how to use ’em – plus, start growing your SQL Server knowledge. You may not even need anything but the free stuff – and that’stotally fine!
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