Re: diagnosing latch free

From: George Schlossnagle <george_at_omniti.com>
Date: Sat, 08 Dec 2001 14:58:14 -0800
Message-ID: <F001.003D85CC.20011208143518@fatcity.com>

oops, probably only want the events that are latch frees:

select ln.name from v$session_wait sw, v$latchname ln where sw.p2 = ln.latch# and sw.event = 'latch free';

On Saturday, December 8, 2001, at 04:50 PM, George Schlossnagle wrote:

Try:

select ln.name from v$session_wait sw, v$latchname ln where sw.p2 = ln.latch#.

Best,

George

www.pythian.com -- schlossnagle_at_pythian.com -- 877-PYTHIAN Smarter than adding another team member, Pythian has new services for supplementing DBAs: get our help with monitoring, 24x7 on-call, daily verifications, storage management, performance and more.

On Saturday, December 8, 2001, at 04:05 PM, Doug C wrote:

I have a session that seems to be hung on a sql_statment.

Here is it's session_wait entry:

SID SEQ#
---------- ----------

EVENT

P1TEXT                                                                   P1


---------------------------------------------------------------- ----------

P1RAW P2TEXT
-------- ----------------------------------------------------------------
P2 P2RAW
---------- --------

P3TEXT                                                                   P3


---------------------------------------------------------------- ----------

P3RAW     WAIT_TIME SECONDS_IN_WAIT STATE


-------- ---------- --------------- -------------------

62       1239
latch free
address                                                           805352248

3000B338 number
88 00000058

tries                                                                   923
0000039B          0               0 WAITING

The seq# goes up from time to time.
My question is how to determine what kind of latch is bothering it? Does P2 (88) indicate what type of latch? Can I join with some other table to find out what 88 is?

Thanks,
D
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--

Author: Doug C
INET: dcowles_at_i84.net

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Author: George Schlossnagle INET: george_at_omniti.com

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