SQL SERVER – Flush Data from Memory to Disk

One of my clients asked me how to Flush Data from Memory to Disk during a recent consulting engagement Comprehensive Database Performance Health Check. Well, the answer is pretty simple in the following script.

SQL SERVER - Flush Data from Memory to Disk FlushSQL-1-800x279

CHECKPOINT

However, the real question is why would we need to do that, when SQL Server can do that automatically. I have been doing SQL Server Performance Tuning for many years and I can confidently say that in my career, I have not needed this feature more than a couple of times.

There have been situations once where the server was heavily crunched for the IO resources and I had given a manual checkpoint with the time parameter so it would take more time to complete but that was a very rare situation. For most cases, the default value and frequency should just work fine.

Do you ever use this command manually? If yes, please leave a command, I would like to know business reason behind it.

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Reference: Pinal Dave (https://blog.sqlauthority.com)

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