sp_BlitzCache®: Free SQL Server Plan Cache Analysis Script

sp_BlitzCache®: Find Your Worst-Performing Queries

You have a SQL Server and you’re not sure which queries are causing your biggest performance problems. You don’t know where to start or if there are hidden queries that are making your main queries slower. You want a fast tool to find the worst queries in the SQL Server plan cache, tell you why they’re bad, and even tell you what you can do about them. sp_BlitzCache® provides the in-depth analysis that you’re looking for. Here’s how it works.

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 recent compilations. Just use sp_BlitzCache @SortOrder = ‘reads’ for example.
  • @Top – by default, we only look at the top 10 queries, but you can use a larger number here like @Top = 50. Just know that the more queries you analyze, the slower it goes.
  • @ExpertMode = 1 – turns on the more-detailed analysis of things like memory grants. (Some of this information is only available in current SP/CUs of SQL Server 2012/2014, and all 2016.)
  • @ExportToExcel = 1 – excludes result set columns that would make Excel blow chunks when you copy/paste the results into Excel, like the execution plans. Good for sharing the plan cache metrics with other folks on your team.
  • @Help = 1 – explains the rest of sp_BlitzCache’s parameters, plus the output columns as well.

How to learn more and get support

In our spare time, between ogling tasting menus, we build more stuff to help:

Don’t have time to learn the hard way? I’m here to help with a quick, easy process that gets to the root cause of your database health and performance pains. My SQL Critical Care® gets to the root of your SQL Server pains and teaches you how to make your databases faster and more reliable. Learn more, see sample reports, and book a free call with me, Brent.

sp_BlitzCache Blog Posts

How to Track Performance of Queries That Use RECOMPILE Hints

Say we have a stored procedure that has two queries in it – the second query uses a recompile hint, and you might recognize it from my parameter sniffing session: Transact-SQL CREATE OR ALTER PROC dbo.usp_SearchUsers @Reputation INT AS BEGIN /* Query 1, always the same: */ SELECT COUNT(*) FROM dbo.Users; /* Query 2, recompiles…
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sp_BlitzCache query warnings

DBA Training Plan 12: What Query Plans Are In Cache?

In the last episode, while talking about the basics of executing queries, I said that SQL Server caches execution plans in memory, reusing them whenever the same query gets executed again. I’ve also talked about the dynamic management views (DMVs) that let you query what’s in SQL Server’s memory. Let’s put those two things together…
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Learn to Use sp_Blitz, sp_BlitzCache, sp_BlitzFirst, and sp_BlitzIndex with These Tutorial Videos

There have been so many improvements lately to our First Responder Kit scripts that it was time to update our tutorial videos. Each of these is about ten minutes long and shows how to use ’em: How to Use sp_Blitz for a Health Check How to Use sp_BlitzCache to Find Slow Queries How to Use…
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Query Tuning Week: How to Run sp_BlitzCache on a Single Query

The most popular way of using sp_BlitzCache® is to just run it – by default, it shows you the top 10 most CPU-intensive queries that have run on your server recently. Plus, it shows you warnings about each of the queries – if they’re missing indexes, experiencing parameter sniffing issues, running long, running frequently, doing…
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