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Performance tuning

Created: 24 Mar 2012 • Updated: 30 Mar 2012 | 10 comments
This issue has been solved. See solution.
I have SEP RU7 installed on my machine, Every thing is working great. We have a mix of Win7 and 2008 R2 and a few XPs
Is there a way in which I can get the same speed that I used to get before installing SEP?

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P_K_'s picture

I think you are talking about File copy performance. If this is the case then ideally in between 2008r2 and Win7 you should get good speed since they use SMB2, SMB2 is faster as compared to SMB1.
Things that you can do

1. Make sure that the following file are updated to the latest version ( srv.sys, Mrxsmb10.sys ,  Mrxsmb.sys and rdb.sys)
 

2. Navigate to  HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Memory Management  and create PoolUsageMaximum

 On the Edit menu, click Add Value, and then add the following registry value:
Value name: PoolUsageMaximum
Data type: REG_DWORD
Radix: Decimal
Value data: 30

3. Follow this blog http://social.technet.microsoft.com/Forums/en/winserverfiles/thread/34b11569-1910-43ce-a6b2-fc73b4cf07f0

This would definitely increase the server performance.

From SEPM side you can disable network scanning but it would not have much impact. When an AV is installed it adds some overhead. Above are the OS tuning that would/should help
 

MCT MCSE-2012 Symantec Technical Specialist (SCTS)

SOLUTION
Vinod Shah's picture

What does this value PoolUsageMaximum do??

P_K_'s picture
The memory manager is designed to that it can swap pages at 80% .
Once the pagedpool is 80% full of its max size,, the inactive pages are moved from the RAM to the page file

There are a very large number of files that are open on the server. By default, the Memory Manager tries to trim allocated paged pool memory when the system reaches 80 percent of the total paged pool. Depending on the system configuration, a possible maximum paged pool memory on a computer can be 343MB and 80 percent of this number is 274MB. If the Memory Manager is unable to trim fast enough to keep up with the demand, the event that is listed in the "Symptoms" section of this article may occur. By tuning the Memory Manager to start the trimming process earlier (for example, when it reaches 60 percent), it would be possible to keep up with the paged pool demand during sudden peak usage, and avoid running out of paged pool memory.

http://support.microsoft.com/kb/312362

MCT MCSE-2012 Symantec Technical Specialist (SCTS)

Cameron_W's picture

"Is there a way in which I can get the same speed that I used to get before installing SEP"

Can you be more specific? What has been affected in terms of performance? Boot times? File copy speed? I would not recommend making registry key changes until a actual issue has been identified.

If I was able to help resolve your issue please mark my post as solution.

P_K_'s picture

You are right that untill and unless we are not sure of the exact symptoms it is not recomended to make any changes to the server.The registry changes have been suggested for File Copy , it is not for Slow logon and anything else.

I think I have clearly mentioned that at the top.

MCT MCSE-2012 Symantec Technical Specialist (SCTS)

P_K_'s picture
The memory manager is designed to that it can swap pages at 80% .Once the pagedpool is 80% full of its max size,, the inactive pages are moved from the RAM to the page file. we can chang ethis by that registry key so that the pagedpool is flushed sooner, the reason for this to be done is say for instance you have a driver that is allocating from paged pool and its allocating a large number of memory very fast..
then your paged pool tends to become full..if we put the reg value to a lower %, then wheneve the paged pool is like 50% full,, the unused pages will be removed the RAM and put on the disk
 

MCT MCSE-2012 Symantec Technical Specialist (SCTS)

Himanta's picture
Sorry for the confusion guys, I forgot to mention, I was taking about File Copy.
 
@ Prachand: Will making the registry chnages have a negative impact on the server?
P_K_'s picture

Thanks alot Himanta, I don't know how many people gave me thumps down to all my comments LOL .

THE REGISTRY KEY WILL NOT HAVE ANY ADVERSE EFFECT. IT A MICROSOFT RECOMENDATION.

PLease read the kb that i have pasted up.

MCT MCSE-2012 Symantec Technical Specialist (SCTS)

Himanta's picture
Thanks Prachand, the trick worked
P_K_'s picture

Thats good news....The trick worked... I never had doubt about this as I have resolved quite a few issues with this.

Few people had doubt about that, but your confirmation clears all doubt.

MCT MCSE-2012 Symantec Technical Specialist (SCTS)