Duty Free!!

SQL Write-Ahead Overhead…

SQL Server on Compressed Filesystems.

Many of us know that the filesystem on which the SQL Datafiles exist shouldnt be Compressed. The main reason that every one knows – it takes more effort to get the IO operations completed. Added to that the Windows  OS doesnt entertain any async IO operations on a Compressed volume. This makes a huge difference when the application, most probably SQL Server, can give a better performance calling the async IO calls. 

More over here by Ken Henderson’s Why you shouldn’t compress SQL Server data and log files


January 20, 2009 - Posted by | SQL Server

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