CxPacket - SQL Server Forums

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CxPacket

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Topic

coolerbob
Aged Yak Warrior

841 Posts

Posted - 2007-05-18 : 07:35:32

I'm noticing about 70 CXPACKET Wait Types in the activity monitor. They never seem to drop away.

We have 4 processors with hyperthreading and parrelism turn on.

Joe Chang made a comment here about that not being so good:
http://www.sql-server-performance.com/forum/post.asp?TOPIC_ID=5864&method=TopicQuote

Is that still the case in SQL2005?

deepakontheweb
Starting Member

14 Posts

Posted - 2007-05-21 : 02:20:11

CXPACKET: Occurs when trying to synchronize the query processor exchange iterator. You may consider lowering the degree of parallelism if contention on this wait type becomes a problem.

ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.en/tsqlref9/html/568d89ed-2c96-4795-8a0c-2f3e375081da.htm

its very well listed in the SQL 2005 BOL. check more using: sys.dm_os_wait_stats

Deepak Kumar
SQL Server MVP, MCDBA

deepak.kumar@sqlknowledge.com

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