Thanks. Yes its shared pool and Library cache.
Shared pool was 4 GB initially I reduced it to 1.5 GB
then we had problem and we increased it to 1.9 GB.
We can't go to 8.1.6 new as it requires lot of testing and users are not ready for that.
I guess I will have to live with that till they decide to go to 8.1.6.
Thanks
-----Original Message-----
From: Connor McDonald [mailto:hamcdc_at_yahoo.co.uk]
Sent: Monday, October 01, 2001 5:41 PM
To: Multiple recipients of list ORACLE-L
Subject: Re: Database Hangs -- System shows latch contentions
What is in V$LATCH. If its shared pool and library
cache contention I'd be tempted to:
- upgrade to 8.1.6+ where the algorithm is better
- reduce the size of your shared pool
hth
connor
--- "Gupta, Brijesh" <Brijesh.Gupta_at_Airliquide.com>
wrote: > Hi all
> My database almost hangs and when I query the
> v$session_wait I found
> latch contention.
> we are running on Oracle 8.0.5 (64bit) Oracle
> application 10.7 SC.
> Shared pool is 1.9GB and SGA 9GB.
> I have to flush the shared_pool to get rid of the
> problem.
>
> Can any one help me in finding the permanent
> solution of this problem.
>
> Brijesh
>
> Wait Sec in
> EVENT time SID Wait
> STATE
> BLOCK
> ------------------------------ ------ -------
> ------- -------------------
> --------------------------
> latch free 0 40
> 1 WAITING
> address=pp92556056 number=60 tries=25
> latch free 0 43
> 0 WAITING
> address=9465536000 number=53 tries=1
> latch free -1 89
> 0 WAITED SHORT TIME
> address=pp92559080 number=60 tries=0
> latch free 0 47
> 0 WAITING
> address=pp92556056 number=60 tries=1
> latch free -1 190
> 0 WAITED SHORT TIME
> address=9465548816 number=59 tries=0
> latch free 0 281
> 1 WAITING
> address=pp92556488 number=60 tries=0
> latch free 1 317
> 2 WAITED KNOWN TIME
> address=9465548816 number=59 tries=0
> latch free -1 343
> 1 WAITED SHORT TIME
> address=9465548816 number=59 tries=0
> latch free 0 391
> 2 WAITING
> address=pp92556200 number=60 tries=25
> latch free 0 369
> 2 WAITING
> address=pp92555768 number=60 tries=26
> latch free 0 631
> 1 WAITING
> address=pp92556344 number=60 tries=0
> latch free -1 627
> 0 WAITED SHORT TIME
> address=pp92559080 number=60 tries=0
> latch free 0 600
> 0 WAITING
> address=pp92556344 number=60 tries=0
> latch free 1 577
> 1 WAITED KNOWN TIME
> address=pp92559224 number=60 tries=0
> latch free -1 465
> 1 WAITED SHORT TIME
> address=9465548816 number=59 tries=1
> latch free 0 448
> 0 WAITING
> address=pp92557208 number=60 tries=0
> latch free 0 414
> 0 WAITING
> address=pp92556920 number=60 tries=0
> latch free 0 409
> 2 WAITING
> address=pp92555912 number=60 tries=26
> latch free 0 950
> 0 WAITING
> address=pp92556632 number=60 tries=2
> latch free 0 949
> 0 WAITING
> address=pp92555768 number=60 tries=1
> latch free 0 930
> 0 WAITING
> address=pp92556776 number=60 tries=1
> latch free 0 915
> 0 WAITING
> address=pp92556920 number=60 tries=0
> latch free 0 901
> 0 WAITING
> address=pp92557064 number=60 tries=0
> latch free -1 889
> 0 WAITED SHORT TIME
> address=9465536000 number=53 tries=0
> latch free 0 858
> 0 WAITING
> address=pp92556344 number=60 tries=1
> latch free 1 832
> 1 WAITED KNOWN TIME
> address=pp92559224 number=60 tries=0
> latch free 0 827
> 0 WAITING
> address=pp92556200 number=60 tries=1
> latch free 0 826
> 0 WAITING
> address=pp92556344 number=60 tries=0
> latch free 0 820
> 0 WAITING
> address=pp92556776 number=60 tries=0
> latch free 0 805
> 0 WAITING
> address=pp92556344 number=60 tries=1
> latch free 0 757
> 0 WAITING
> address=pp92555768 number=60 tries=1
> latch free 0 718
> 1 WAITING
> address=pp92556632 number=60 tries=0
> latch free 0 697
> 0 WAITING
> address=pp92556056 number=60 tries=1
> latch free 0 666
> 0 WAITING
> address=pp92556200 number=60 tries=0
> latch free 0 1154
> 0 WAITING
> address=pp92555912 number=60 tries=1
> latch free 0 1138
> 0 WAITING
> address=pp92556200 number=60 tries=0
> latch free 0 1132
> 0 WAITING
> address=9465536000 number=53 tries=1
> latch free 0 1068
> 0 WAITING
> address=pp92556776 number=60 tries=2
> latch free 0 1058
> 0 WAITING
> address=9465536000 number=53 tries=1
> latch free 1 1037
> 0 WAITED KNOWN TIME
> address=pp92557064 number=60 tries=0
> latch free -1 963
> 0 WAITED SHORT TIME
> address=pp92556200 number=60 tries=1
> latch free 0 952
> 0 WAITING
> address=pp92556776 number=60 tries=1
> latch free 1 1425
> 0 WAITED KNOWN TIME
> address=pp92556200 number=60 tries=0
> latch free 0 1421
> 2 WAITING
> address=pp92555768 number=60 tries=29
> latch free 0 1412
> 0 WAITING
> address=pp92556344 number=60 tries=0
> latch free 0 1398
> 0 WAITING
> address=9465536000 number=53 tries=1
> latch free -1 1385
> 1 WAITED SHORT TIME
> address=9465548816 number=59 tries=0
> latch free 1 1357
> 0 WAITED KNOWN TIME
> address=9465536000 number=53 tries=1
> latch free 0 1338
> 2 WAITING
> address=pp92555912 number=60 tries=25
> latch free 0 1330
> 2 WAITING
> address=pp92556200 number=60 tries=19
> latch free 0 1301
> 0 WAITING
> address=pp92556200 number=60 tries=0
> latch free -1 1239
> 0 WAITED SHORT TIME
> address=9465548816 number=59 tries=1
> latch free 0 1188
> 2 WAITING
> address=pp92556200 number=60 tries=18
> latch free -1 1186
> 0 WAITED SHORT TIME
> address=9465548816 number=59 tries=0
> latch free -1 1498
> 1 WAITED SHORT TIME
> address=pp92557640 number=60 tries=0
> latch free 0 395
> 0 WAITING
> address=pp92556488 number=60 tries=0
> latch free 0 333
> 1 WAITING
> address=pp92556488 number=60 tries=0
> latch free -1 289
> 1 WAITED SHORT TIME
> address=9465548816 number=59 tries=0
> latch free 0 227
> 0 WAITING
> address=pp92556056 number=60 tries=0
> latch free 0 129
> 0 WAITING
>
=== message truncated ===
Connor McDonald
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http://www.oradba.freeserve.co.uk)
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Received on Tue Oct 02 2001 - 09:10:49 CDT
