SQL 2008 Memory Usage

Posted by Danilo Brambilla on Server Fault See other posts from Server Fault or by Danilo Brambilla
Published on 2011-02-17T11:36:13Z Indexed on 2012/03/29 17:32 UTC
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I have a SQL Server 2008 (ver 10.0.1600) running on a Windows Server 2008 R2 Enterprise server with 8 GB of physical ram. If I open Task Manager I can see on 'Physical Memory' section of 'Performance' tab that only 340 MB are Available of 8191 Total, but I can't see any process using such amount of memory. Please note SQL Server is memory limited to 6GB (Maximum Server Memory = 6000).

If I open Sysinternals Process Explorer, I can see sqlsrvr.exe process has:

Private Bytes:  227.000 K
Working Set:    140.000 K
Virtual Size: 8.762.000 K

What does this means? Is there any way to free up this memory for other process? Why Virtual Size figure as allocated memory? I thought that Virtual Size was 'reserved memory' only.

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