RE: Latch 'parallel query qref latch'

Ben:

The qref latch is obtained for each Parallel Query process. It is acquired before the queue buffers can be manipulated so that communication can take place between the various slave processes. The latch is acquired for putting messages into the buffer. You will generally see lots of misses for this latch since it is acquired with a nowait option.

Jon Walthour, OCDBA
Oracle DBA
Computer Horizons
Cincinnati, Ohio

>--- Original Message ---
>From: "Ben Jones" <benjonesz123_at_hotmail.com>
>To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
>Date: 6/14/01 1:56:36 PM
>

>Does anyone know what causes waits on this latch ?
>
>Thanks
>Ben
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Author: Jon Walthour
  INET: jwalthour_at_mac.com

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