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WaitForChildren: Children persisting. Retry Expand / Collapse
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Posted Thursday, September 4, 2008 4:27 AM
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Hi,

Seem to have an issue with a rogue spid, details as follows;

Numerous entries in SQL log relating to-

2008-09-04 10:28:13.99 spid123 WaitForChildren: Children persisting. Retry: 68144

SP_who returns details of SPID 123 - Database = Master, status sleeping, not processing in 16 days, wait type = EC

SPID 123 is sleeping and has not done any processing in 16 days

SPID 123 was selecting some data from a temporary table as follows.

select replace(cast(TextData as varchar), 'Deadlock Chain SPID = ', '') FROM #deadlocktrace where textdata like '%Deadlock Chain SPID%' union select SPID FROM #deadlocktrace where textdata like '%Deadlock Cha

Kill 123 results in
Server: Msg 6107, Level 14, State 1, Line 1
Only user processes can be killed.

Implication is that spid 123 is a system process(?) - which it isn't

My questions are, what does WaitForChildren: Children persisting. Retry actually mean? and how can I kill SPID 123?

Any suggestions gratefully received.
Post #563677
Posted Thursday, September 4, 2008 4:56 AM


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Please check this bugfix :
http://support.microsoft.com/kb/319184

This hotfix states "This problem was first corrected in Microsoft SQL Server 2000 Service Pack 3"

Which is your sqlsever @@version ?

(maybe it's time to implement sp4)


Johan


Don't drive faster than your guardian angel can fly ...
but keeping both feet on the ground won't get you anywhere

- How to post Performance Problems
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- How to prevent a sore throat after hours of presenting ppt ?


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Post #563684
Posted Thursday, September 4, 2008 9:11 AM
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Thanks for the reply, the server is on SQL sp 4
Post #563900
Posted Thursday, September 4, 2008 11:48 PM


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You didn't post the @@version.

This is a sqlserver parallelism issue.

Did you also apply Cumulative HofFix for sp4(build 2187) - SQL2000-KB916287-v8.00.2187 ?


Johan


Don't drive faster than your guardian angel can fly ...
but keeping both feet on the ground won't get you anywhere

- How to post Performance Problems
- How to post data/code to get the best help


- How to prevent a sore throat after hours of presenting ppt ?


"press F1 for solution", "press shift+F1 for urgent solution"


Need a bit of Powershell? How about this

Who am I ? Sometimes this is me but most of the time this is me
Post #564337
Posted Friday, September 5, 2008 2:07 AM
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As requested

Microsoft SQL Server 2000 - 8.00.2039 (Intel X86)
May 3 2005 23:18:38
Copyright (c) 1988-2003 Microsoft Corporation
Standard Edition on Windows NT 5.0 (Build 2195: Service Pack 4)


Post #564385
Posted Friday, September 5, 2008 2:23 AM


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8.00.2039 is the regular SP4

Is this a multi processor or multi core box ?
if yes: IMO your should apply the cumulative hotfix I mentioned earlier.


Johan


Don't drive faster than your guardian angel can fly ...
but keeping both feet on the ground won't get you anywhere

- How to post Performance Problems
- How to post data/code to get the best help


- How to prevent a sore throat after hours of presenting ppt ?


"press F1 for solution", "press shift+F1 for urgent solution"


Need a bit of Powershell? How about this

Who am I ? Sometimes this is me but most of the time this is me
Post #564390
Posted Friday, September 5, 2008 2:30 AM
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SQL2000-KB916287-v8.00.2187 has not been applied
Post #564396
Posted Friday, September 5, 2008 3:09 AM


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are you using AWE ? http://support.microsoft.com/kb/899761


Johan


Don't drive faster than your guardian angel can fly ...
but keeping both feet on the ground won't get you anywhere

- How to post Performance Problems
- How to post data/code to get the best help


- How to prevent a sore throat after hours of presenting ppt ?


"press F1 for solution", "press shift+F1 for urgent solution"


Need a bit of Powershell? How about this

Who am I ? Sometimes this is me but most of the time this is me
Post #564406
Posted Friday, September 5, 2008 4:00 AM
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Hi,

AWE is not enabled
Post #564424
Posted Friday, September 5, 2008 4:11 AM


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Can you apply the workaround (i.e. disable parallelisme) ?
from KB319184

WORKAROUND
To work around this behavior you can either:
• Use the query hint (MAXDOP=1) to avoid a parallel query plan.

-or-

• Set the max degree of parallelism configuration value to 1.



Johan


Don't drive faster than your guardian angel can fly ...
but keeping both feet on the ground won't get you anywhere

- How to post Performance Problems
- How to post data/code to get the best help


- How to prevent a sore throat after hours of presenting ppt ?


"press F1 for solution", "press shift+F1 for urgent solution"


Need a bit of Powershell? How about this

Who am I ? Sometimes this is me but most of the time this is me
Post #564427
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