All I suggest to reduce the shared pool to a 25% or
less and set the shared reversed area to a 20% of the
pool considering the amount of packages and code of
Applications. Then I implement the policy of pining
packages. And certainly the most important to pin will
be the STANDARD.
Also I would set the parameter _kgl_bucket_count. Look
in the web page of S.Adams for an script to estimate
it.
And about flushing I should do it with an agent or
cron that check the amount of free memory from
V$SGASTAT. When it closes to a few bytes, I flush the
shared pool.
I should ask to Oracle and Applications Release. I
think 11 is more stable than 10.7. Also look in
metalink about bugs over App 10.7 and 8.0.5.
Regards.
- Connor McDonald <hamcdc_at_yahoo.co.uk> wrote:
> Some things you could look at:
>
> a) implement a very agressive keep-ing policy using
> dbms_shared_pool to limit fragmentation
> b) once (a) is done, you can do a shared pool flush
> without having much impact.
>
> Are you parsing a lot? If you are, you may get some
> joy with the cursor_sharing parameter - but this is
> known to have some bugs here and there in the
> earlier
> 8i versions.
>
> hth
> connor
>
> --- "Gupta, Brijesh" <Brijesh.Gupta_at_Airliquide.com>
> wrote: > Thanks. Yes its shared pool and Library
> cache.
> > Shared pool was 4 GB initially I reduced it to 1.5
> > GB
> > then we had problem and we increased it to 1.9 GB.
> >
> > We can't go to 8.1.6 new as it requires lot of
> > testing and users are not
> > ready for that.
> >
> > I guess I will have to live with that till they
> > decide to go to 8.1.6.
> >
> > Thanks
> >
> > -----Original Message-----
> > Sent: Monday, October 01, 2001 5:41 PM
> > To: Multiple recipients of list ORACLE-L
> >
> >
> > What is in V$LATCH. If its shared pool and
> library
> > cache contention I'd be tempted to:
> >
> > a) upgrade to 8.1.6+ where the algorithm is better
> > b) 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
> >
> === message truncated ===
>
> =====
> Connor McDonald
> http://www.oracledba.co.uk (mirrored at
> http://www.oradba.freeserve.co.uk)
>
> "Some days you're the pigeon, some days you're the
> statue"
>
>
> Do You Yahoo!?
> Get your free @yahoo.co.uk address at
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> --
> Author: =?iso-8859-1?q?Connor=20McDonald?=
> INET: hamcdc_at_yahoo.co.uk
>
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Eng. Christian Trassens
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Received on Wed Oct 03 2001 - 03:31:51 CDT
