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SQL 2005 process running at 100% CPU

Posted on 2011-03-09
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Last Modified: 2012-05-11
My sqlservr.exe process is running at 100% CPU utilization throughout most of the day... I'm running Windows 2003 Server 32 bit as a VM on a VMWare ESXi host.  I found the below link, however, I'm not sure if I'm running NUMA (non-uniform memory access).  Does this hotfix pertain to me?  The ESXi host hardward is a HP DL 380 G4.

http://support.microsoft.com/kb/931821/en-us

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Question by:gopher_49
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by:Danny McDaniel
ID: 35088355
it doesn't appear that your system is supported by ESXi 4.x and doesn't have the newer Intel processors that are NUMA based, so unless you see the lazywriter behavior described in the MS KB...I would think that it doesn't apply to you and your cause is something else.
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by:gopher_49
ID: 35088698
ok.. I might simply be that I have alot of indexing and/or transactions going on.  It's constantly archiving emails. Once I stop the archiving process (on a different server) it then gets better...  What if I set the priority to the process lower?  Would that help?  Is that suggested?
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by:Danny McDaniel
ID: 35089109
I'm not a SQL expert so I don't know what the affect would be if you changed the process priority.   You might want to open this question up to the SQL Server zone.
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by:Luciano Patrão
ID: 35093542
Hi

With this server and this CPU, I think you will get that 100% CPU in any VM that you use that needs CPU processing.

Like danm66, that server is not supported.
This is the same as Dell SC1425 or 1950. It works for some models, but all the VMs have many times with the CPU between 80/100% use.

Jail
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Author Comment

by:gopher_49
ID: 35098479
I ran this VM and this SQL db causing the CPU utlization for months and no problem.  This just recently started a few days ago...  I refreshed the install of the app (the app is on a physical server and saves to the SQL db on the VM) and ever since then I've noticed this.  When using the SQL profiler I'm able to see which aspect of the db is causing the high CPU utilization, however, it's never done this before.

I seriously don't think it's an issue with my procs and/or compatibility for it's never done this in the past.
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by:gopher_49
ID: 35098494
Also,

I have 2 x DL 380 G4's running 7+ VM's and none of the other VM's do this..  And two of them are running the same version of SQL...  I really think it's a software/db issues..  I have the stored procedures that it's choking on.  I might end up contacting the software vendor...
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by:Danny McDaniel
ID: 35098984
I agree, contacting the s/w vendor sounds like a good next step.  Sounds like there's something out of sync causing the procedure to get hung up.
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Author Comment

by:gopher_49
ID: 35099247
I'll call them and then will update the ticket.  I used the SQL Profiler to determine what exact aspect of the DB is causing the issue.  That should speed things up...  
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gopher_49 earned 0 total points
ID: 35215078
It ended up being an issue with my indexes...  Once I rebuilt the SQL indexes the processor performed like it did in the past.  It does spike and sometimes even hangs for awhile when really busy, however, throughout most of the day it's fairly normal... Next year I plan to replace my ESXi hosts with HP g6's dual 4 x core procs...  I'll then void these CPU performance issues.
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by:Danny McDaniel
ID: 35220362
How many vcpu's do you have assigned to the vm in question and how much RAM?
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by:SBPGOIT
ID: 36013217
gopher_49 how were you able to see that in the profiler?
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