RE: difference between child and parent latches?
- From: "Bobak, Mark" <Mark.Bobak@xxxxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 22 Mar 2004 09:33:23 -0500
Ryan,
The main difference is that for latches which there are multiples, such as
cache buffers chains, there is only one parent row in v$latch_parent, whereas
there is one row per latch in v$latch_children. Also, the statistics are only
valid in the corresponding view. Meaning, GETS, SLEEPS, etc are only populated
in v$latch_children for those latches where children are present, such as CBC.
For those where there's only one, such as shared pool, that data is only
populated in v$latch_parent.
-Mark
-----Original Message-----
From: ryan.gaffuri@xxxxxxx [mailto:ryan.gaffuri@xxxxxxx]
Sent: Monday, March 22, 2004 7:54 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: difference between child and parent latches?
I've been looking at v$latch_children and v$latch_parent and I'm having trouble
seeing the differences?
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