Oracle-L: RE: Wait Event "PX Deq: Execution Msg"

From: Nancy McCormick <nmccormick_at_sbti.com>
Date: Fri, 17 May 2002 05:23:20 -0800
Message-ID: <F001.00463527.20020517052320@fatcity.com>

I failed to mention this is an 8.1.7.3 database. Sorry about that. Nancy

-----Original Message-----
McCormick
Sent: Thursday, May 16, 2002 7:53 PM
To: Multiple recipients of list ORACLE-L

Hello,

I am hoping someone can help me with an elusive wait event called 'PX Deq: Execution Msg'. As you can see from the statspack "Top 5 Wait Events" this event accounts for almost 75% of the wait time. I have been looking in past Oracle-L posts, Google, Oracle FAQ, OTN, Metalink, Oracle manuals, etc. I can find almost nothing about this event. What I did find leads me to believe may be an idle event and that it is the second event 'PX Deq Credit: send blkd' that may be the more troublesome one. However I am still confused about both. Can someone help set me straight or tell me where there might be some more information about these 2 events?

Thanks,
Nancy

Top 5 Wait Events

~~~~~~~~~~~~~~~~~                                             Wait     %
Total
Event                                               Waits  Time (cs)   Wt

Time

-------------------------------------------- ------------ ------------ -----
--
PX Deq: Execution Msg                              42,144    8,639,803
74.48
PX Deq Credit: send blkd                           15,339    2,878,443
24.81
log file parallel write                            41,934       30,787


.27

db file parallel write                              8,776       25,046


.22

db file sequential read                            24,767       18,255

.16

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Author: Nancy McCormick
  INET: nmccormick_at_sbti.com

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Author: Nancy McCormick
  INET: nmccormick_at_sbti.com

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Received on Fri May 17 2002 - 08:23:20 CDT