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Using sp_who2 to help with SQL Server troubleshooting
If you haven’t used sp_who2 before then it is a great utility to help in diagnosing a problem with your database application.What is sp_who2 ?It’s a stored procedure which is installed with SQL Server...
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How to Delete Millions of Rows using T-SQL with Reduced Impact
In this post, I talk about deleting millions of rows in SQL Server whilst keeping impact low.Deleting millions of rows in one transaction can throttle a SQL ServerTRUNCATE TABLE – We will presume that...
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An Introduction to SQL Server Wait Types and Stats
Ok, so in this post, I wanted to go over SQL Server wait types and statistics – what they are and how to check them.My idea is then to start a series of posts which go into more detail about...
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An Overview of SQL Server Task Scheduling
In my previous post, I touched upon SQL Server wait types and in order to understand wait types in SQL Server, it’s important to know first how the server schedules tasks.On each CPU core, only a...
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Reducing SQL Server CXPACKET Wait Type
In my last post, I wrote about how SQL Server schedules tasks to be executed. It’s important to be able to understand this when when trying to analyse wait types and statistics in SQL Server.For this...
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The OLEDB Wait Type and How to Reduce It
In this post, I look at the OLEDB wait type.Books Online lists this asOccurs when SQL Server calls the SQL Server Native Client OLEDB Provider. This wait type is not used for synchronization. Instead,...
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Using DBCC FREEPROCCACHE to Clear SQL Server Procedure Cache
It is possible to clear out the entire SQL Server procedure cache using DBCC FREEPROCCACHEThe procedure cache is where SQL Server will cache execution plans after they have been compiled. The benefit...
View ArticleWhen are Innodb Table Statistics Updated?
Innodb statistics are used by the query optimizer to assist it in choosing an efficient query execution plan. They are estimated values relating to each Innodb table and index.But what updates them?...
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10 Database Performance Monitoring Tools You Can Get For Free
Database performance monitoring is something every DBA worth their salt should be doing on a regular basis.It should be adopted as a proactive task to help identify issues early on before they become...
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How to Produce CSV Format Using T-SQL
There may be some requirements where you need to produce a csv output from a table. There are some good, efficient ways to do this and there are also some less efficient ways. Let us now look at one...
View ArticleHow to Find Buffer Pool Usage Per Database in SQL Server
As a DBA it’s important to understand what the buffer pool is doing and which databases are using it the most. Data in SQL Server is stored on disk in 8k pages. The buffer pool (Aka “buffer cache”) is...
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How to List CPU Usage Per Database in SQL Server
As a DBA there may be a time when you want to try and ascertain how much CPU time each of your databases is consuming. This is useful to complement high CPU investigations or to just try and understand...
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How to Find I/O Usage Per Database in SQL Server
If you’re looking at performance and trying to understand I/O on a per database level in SQL Server, sadly there is not a report in Management Studio that you can run from those available. It will need...
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SQL Server 2016 New Features – Query Store
In this series of posts covering the new features in SQL Server 2016, I’m moving on to looking at the Query Store. This tool provides a way to track query execution plan performance over time to help...
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SQL Server 2016 New Features – Live Query Statistics
SQL Server 2016 Live Query Statistics provide a way to look into the execution plan to see what parts of the query are currently running. The advantage of this feature is that for a slow query, instead...
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