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CXPACKET wait type


CXPACKET wait type

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Ninja's_RGR'us
Ninja's_RGR'us
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SKYBVI (7/27/2011)
aNY SOLUTION?


Please start a new thread. This one has been revived 4 times already and I don't think there's much more to add to it at this point.
Ninja's_RGR'us
Ninja's_RGR'us
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I know this is an old thread but since it seems to be found often on google, I find it important to tell anybody reading this that our collective understanding of cxpackets was upgraded over the years. And by quickly skimming this thread I see some info that could use adjusting.


Paul White has spent a genormous amount of time writing this amazing article debunking that myth once and for all.

Have a nice read : http://www.simple-talk.com/sql/learn-sql-server/understanding-and-using-parallelism-in-sql-server/
scogeb
scogeb
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Ninja's_RGR'us (8/7/2011)
I know this is an old thread but since it seems to be found often on google, I find it important to tell anybody reading this that our collective understanding of cxpackets was upgraded over the years. And by quickly skimming this thread I see some info that could use adjusting.


Paul White has spent a genormous amount of time writing this amazing article debunking that myth once and for all.

Have a nice read : http://www.simple-talk.com/sql/learn-sql-server/understanding-and-using-parallelism-in-sql-server/


Google search brought me here, LOL. That link isn't working for me. Is it correct?
Ninja's_RGR'us
Ninja's_RGR'us
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Still works for me


http://www.simple-talk.com/sql/learn-sql-server/understanding-and-using-parallelism-in-sql-server/
Chris Burton-434978
Chris Burton-434978
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Whilst reducing the number of Processors used will reduce parallelism waits it may not be the best way to 'fix' the query ie. there are probably other underlying issues

A good link on the 'barking dog analogy'

http://www.sqlsoldier.com/wp/sqlserver/thebarkingdoganalogy
Paul White
Paul White
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scogeb (12/3/2012)
Ninja's_RGR'us (8/7/2011)
I know this is an old thread but since it seems to be found often on google, I find it important to tell anybody reading this that our collective understanding of cxpackets was upgraded over the years. And by quickly skimming this thread I see some info that could use adjusting.


Paul White has spent a genormous amount of time writing this amazing article debunking that myth once and for all.

Have a nice read : http://www.simple-talk.com/sql/learn-sql-server/understanding-and-using-parallelism-in-sql-server/


Google search brought me here, LOL. That link isn't working for me. Is it correct?

Yes. (Working on part 2 now).



Paul White
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lianvh 89542
lianvh 89542
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Good Day,
our environment runs on SQL Server 2008R2 64 bit Ent with 32 CPUs and 200 gig of memory . When I run diagnostics queries to see which processor is busy , there are only 4 processors at a time with readings lower than 10 at a time the others have readings of 0 . We did add the required indexes and tuned the code , but we still get CXPacket SOS_SCHEDULEr_Yield waits . Any ideas ?
GilaMonster
GilaMonster
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Please post new questions in a new thread. Thanks

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

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