Thanks. Just found this at Metalink:
http://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=191103.1
... wherein they say that statspack will be modified to filter these
additional idle events
Yong Huang wrote:
> jmsalvo_at_ihug.com.au (john) wrote in message news:<fa6269d2.0206100047.200f790e_at_posting.google.com>...
>
>>Event Waits Time (cs)
>>Wt Time
>>-------------------------------------------- ------------ ------------
>>-------
>>PX Deq Credit: send blkd 334,105 176,389
>> 37.10
>>PX Deq: Execution Msg 35,860 57,729
>> 12.14
>>PX Deq: Table Q Normal 865,976 50,065
>> 10.53
>>PX Deq: Execute Reply 22,596 46,401
>> 9.76
>>db file scattered read 285,813 44,901
>> 9.44
>
>
> A metalink document at
> http://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=FOR&p_id=113386.999
> has this explanation:
>
> PX Deq:Table Q Normal
> No description available
> Parameters:
> P1: sleeptime/senderid
> P2: passes
> P3:
>
> PX Deq:Execution Msg
> Definition:PQ slave is waiting to be told what to do.
> This is one of the main events used in a parallel query
> dialogue as the slave is told to parse / execute / fetch etc..
> Parameters: P1: sleeptime/senderid
> P2: passes
>
> PX Deq: Execute Reply
> Definition: QC is waiting for a reply
> Parameters: P1: sleeptime/senderid
> P2: passes
>
> PX Deq Credit: send blkd
> Definition: Waiting for the CREDIT
> Parameters: P1: sleeptime/senderid
> P2: passes
> P3: qref
> This Wait Event replaces Parallel_Query_Dequeue, the name was changed
> in Oracle8i.
>
> PX Deq Credit: need buffer
> Definition: Waiting for the CREDIT so we can fill a buffer to send
> data.
> Parameters: P1: sleeptime/senderid
> P2: passes
> P3: qref
> This Wait Event replaces Parallel_Query_Dequeue, the name changed in
> Oracle8i.
>
> If you search on Metalink carefully, you'll find a number of messages
> from Jonathan Lewis about these events. Oracle usually say these are
> idle waits and can be ignored. Whether that's true depends on how you
> look at it.
>
> I don't know where to find a complete list of wait events and latches.
> I asked this question here before.
>
> Yong Huang
Received on Tue Jun 11 2002 - 00:32:10 CDT
