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NUMA and PLE on SQL Server 2012


NUMA and PLE on SQL Server 2012

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Don Halloran
Don Halloran
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Haha, likewise. The problem is a version incompatibility between sqlservr.exe and sqlaccess.dll. We've just been sent a link to an updated one, but we had already decided to roll back to RTM, couldn't wait any longer.

RTM seems much better. I'm going to hold out for SP2.

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Tommy Bollhofer
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allmhuran (4/16/2013)
Haha, likewise. The problem is a version incompatibility between sqlservr.exe and sqlaccess.dll. We've just been sent a link to an updated one, but we had already decided to roll back to RTM, couldn't wait any longer.

RTM seems much better. I'm going to hold out for SP2.



We disabled strong name validation to work around the CLR issue; i.e.

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\StrongName\Verification\*,*]

Testing thus far confirms build 3351 resolves the issue. I imagine we will see this make its way into CU4 and SP2.

Tommy

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Don Halloran
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I'm not 100% convinced. We only had one weekday with the hotfix installed, but this graph of timeouts captured on the application servers seems to indicate pretty clearly that RTM is better than SP1 with and without the 3351 fix installed:



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Stefan_G
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I also have a very similar issue.

Are you saying that you fixed your PLE-problem by rolling back to the RTM version ?

Are you using plain RTM, or have you applied any CU?
Don Halloran
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2012 RTM is definitely better than SP1. No CU's applied, although if you go to 7 it should be OK, apparently this specific problem appeared with SP1.

Having said that, in my opinion 2008R2 running on half the hardware was performing better than 2012 RTM is performing. Unfortunately infrastructure can't provide me with detailed stats from that far back for a proper comparison.

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TheSQLGuru
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allmhuran (4/24/2013)
Having said that, in my opinion 2008R2 running on half the hardware was performing than 2012 RTM.


WOW! That's quite a statement!! Crying

Best,

Kevin G. Boles
SQL Server Consultant
SQL MVP 2007-2012
TheSQLGuru at GMail
Tommy Bollhofer
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allmhuran (4/18/2013)
I'm not 100% convinced. We only had one weekday with the hotfix installed, but this graph of timeouts captured on the application servers seems to indicate pretty clearly that RTM is better than SP1 with and without the 3351 fix installed:



After several days of testing, I'm not convinced either. I stood up an RTM instance after you posted this for good measure and I'm seeing the same behavior. Still some work to do with the 3351 build. MS is supposedly going to produce a new build in the coming weeks for us to test.

Tommy

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Tommy Bollhofer
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FYI, it would appear CU4 for SQL Server 2012 SP1 is immanent based on KB2828205. It is my understanding CU4 will correct the memory management issue which was broken in SP1; discussed here as well as in this thread. The link to the KB article regarding CU4 is broken however.

https://www.sqlservercentral.com/Forums/Uploads/image-unavailable.png



Tommy

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Tommy Bollhofer
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CU4 for SQL Server 2012 has been released which corrects this issue.

http://support.microsoft.com/kb/2845380

CU4 is available for download via:

http://support.microsoft.com/kb/2833645

Tommy

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Don Halloran
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We may go to CU4, but we're still investigating general performance issues on the 2012 RTM instance.

I have a good amount of data that can be repeatably produced by a long running, well defined process. It's going to take a while to come to any conclusions but Microsoft is looking at the data as are a few generous, high profile community members who have taken an interest.

I'll post any useful information in this thread as well as the similar one that I started.

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