Sql server 2005, Timeout problem and High CPU : Microsoft, Sql Server, 2005

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03.28.2008 at 06:29AM PDT, ID: 23277078 | Points: 500

	[x] Attachment Details

Sql server 2005, Timeout problem and High CPU

Zones: MS SQL Server, Windows 2003 Server, SQL Server 2005

Tags: Microsoft, Sql Server, 2005

We have been experiencing many timeouts and a very high CPU on our DB Server.

We have a lot of wait type of:
RESOURCE_SEMAPHORE_QUERY_COMPILE

We think that may be the problem but it could be other things.
we already use forced parameterization.

how would we be able to find why this is happening and what we can do about it.

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Question Stats

Zone: Microsoft

Question Asked By: rnby

Question Asked On: 03.28.2008

Participating Experts: 1

Points: 500

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03.28.2008 at 07:26AM PDT, ID: 21230671

Rank: Guru

mastoo:

I'd focus on who is sucking the cpu time. Use one of the sql tools to identify top cpu usage connections, or use this sqlhogs script during the heavy activity:

http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/Q_22418533.html

You might also verify that you have some regular updates of statistics as that can eventually lead to slowness.

03.28.2008 at 07:43AM PDT, ID: 21230850

rnby:

That doesn't seem to be the problem.

This are the results I get for the CpuPercent
4
4
3
3
3

I have a feeling it's related to temp tables, but the problem is not lack of memory or space with it.
the user connections tho the temp db is 100% and doesn't go down also the transactions stays at 100% with an amount of 1500 transactions per second on average.

the active transactions is an average of 2
but climbs to 10

we have about a gb free of space in out tempdb
the active temp tables is currently on 139 and is slowly climbing with a max of 150 now

20080206-EE-VQP-25 / EE_QW_2_20070628