Recently my client of Comprehensive Database Performance Health Check asked me if we can use the CREATE statement in the TRANSACTION or not.
Dirty Read with NOLOCK – SQL in Sixty Seconds #110
Recently I noticed that my client has been using the WITH NOLOCK hint with their queries and expecting that it will improve the queries performance.
SQL SERVER – Memory Optimized Tables, Transactions, Isolation Level and Error
Today we will see an interesting story about Memory Optimized Tables, Transactions, Isolation Level and Error. Let us read the blog post.
SQL SERVER – Applying NOLOCK to Every Single Table in Select Statement – SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
The other day, during SQL Server Performance Tuning Practical Workshop, I walked into a very interesting situation. While tuning a query we had a situation when we had to check if the query is locked during the execution of not. To test our theory out we had to put a nolock hint for every single table of the long query. However, it was no way possible to do so as the Stored Procedure was super huge and involved over 90 tables and 14 views in multiple SQL Statements. It was indeed a huge challenge for a developer team to modify that SP. If you ever face such situations, you should not stress out. There is a much simpler way to read uncommitted data.
SQL SERVER – How to Know Transaction Isolation Level for Each Session?
During recent, Comprehensive Database Performance Health Check, I had a very interesting scenario. I was hired by a customer to identify their system’s unexpected performance bottlenecks. I do these for a living so I am usually pretty comfortable. However, this customer was so unique that after their permission I am sharing you their story of transaction isolation level.
SQL SERVER – Difference Between Read Committed Snapshot and Snapshot Isolation Level
It is quite common that when a new feature gets introduced, there is a lot of talk about them. Sometimes even the old capabilities are lesser known because they can be used interchangeably in conversations. I have seen many DBAs getting confused between these two terms because both of them…
Read MoreSQL SERVER – Check the Isolation Level with DBCC useroptions
In recent consultancy project coordinator asked me – “can you tell me what is the isolation level for this database?” I have worked with different isolation levels but have not ever queried database for the same. I quickly looked up bookonline and found out the DBCC command which can give…
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