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sqlservr.exe process only growing to 125Mb on very busy system - why ? Expand / Collapse
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Posted Monday, December 17, 2012 10:25 AM
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Hi,

We have a SQL 2005 instance that's the back end DB for our company helpdesk system. Performance of late has been sluggish and upon investigation i've noticed the sqlservr.exe process is only using 125Mb of memory.

The server has 6GB and sql is configured to use up to 4GB of that so i'm at a loss why it's not growing past 125Mb ?

The process is however clocking a lot of CPU at 50-90%

Any ideas ?

TIA,
M
Post #1397343
Posted Monday, December 17, 2012 11:23 AM


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Don't use Task Manager to check SQL's memory usage. It doesn't report correctly.


Gail Shaw
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Post #1397362
Posted Monday, December 17, 2012 11:25 AM
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Thanks Gail - what's the recommended way ?
Post #1397363
Posted Monday, December 17, 2012 11:26 AM


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Performance Monitor. Total Server memory counter (it's a SQL counter)


Gail Shaw
Microsoft Certified Master: SQL Server 2008, MVP
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We walk in the dark places no others will enter
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Post #1397364
Posted Tuesday, December 18, 2012 2:55 AM
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Thanks Gail - it's showing as 4194304 (ie 4Gb) in perfmon

The instance has AWE enabled, is the view this is better to have on than off ?
Post #1397632
Posted Tuesday, December 18, 2012 3:12 AM
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Whilst i was in perform i noticed the pages/sec was quite spiky with peaks of around 1500/sec.

Is this on the high side or normal server performance ?
Post #1397642
Posted Tuesday, December 18, 2012 3:21 AM


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mjwlufc (12/18/2012)
The instance has AWE enabled, is the view this is better to have on than off ?


32 bit or 64 bit SQL?

Whilst i was in perform i noticed the pages/sec was quite spiky with peaks of around 1500/sec.


Which pages/sec counter? (there's more than one of them and they mean very, very different things)



Gail Shaw
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SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass

Post #1397646
Posted Tuesday, December 18, 2012 3:33 AM
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It's this version

Microsoft SQL Server 2005 - 9.00.5057.00 (Intel X86) Mar 25 2011 13:50:04 Copyright (c) 1988-2005 Microsoft Corporation Enterprise Edition on Windows NT 5.2 (Build 3790: Service Pack 2)

The VM has 6Gb or RAM with SQL capped at 4GB

The memory objects i'm lookin at are pages /sec and page faults/sec

page faults/sec is spiking up to 15000 - seems very high.

And advise on improving the situation is much appreciated
Post #1397654
Posted Tuesday, December 18, 2012 3:38 AM


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mjwlufc (12/18/2012)
The memory objects i'm lookin at are pages /sec and page faults/sec


Which pages/sec? Under which section? There are multiple pages/sec counters in different sections and they mean different things.

Since you're using 32 bit SQL, having AWE on is required to access more than 2 GB of memory.



Gail Shaw
Microsoft Certified Master: SQL Server 2008, MVP
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass

Post #1397660
Posted Tuesday, December 18, 2012 4:11 AM
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Gail if i was a little unclear.

Both the paging counters were selected from the 'memory' performance object.
Post #1397679
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