Re: Re: Benchmark runs - Waits on enqueue , latch free - & AGAIN

Hi !

The current value can be obtained from X$KSPPI. The other way (and recommedned by Steve ) is to select the count(*) from V$latch_children where latch=library cache, (look for the right columns in the views.i am just giving an idea).

And i don't think this parameter is _that_dangerours.

Best Regards,
K Gopalakrishnan
Bangalore, INDIA

• Original Message ----- From: VIVEK_SHARMA <VIVEK_SHARMA_at_infy.com> To: 'K Gopalakrishnan' <kaygopal_at_yahoo.com> Cc: <ORACLE-L_at_fatcity.com>; <oracledba_at_quickdoc.co.uk> Sent: Tuesday, September 05, 2000 12:11 PM Subject: RE: Re: Benchmark runs - Waits on enqueue , latch free - & AGAIN

>
> Do you mean _kgl_latch_count (number of library cache latches) instead of
> _kgl_bucket_count (index to the bucket count array) ?
>
> Qs. How to Get the CURRENT Values for the Same ?
> Qs. Is it OK to Change these parameters in ORA 7.3.4.5.0 on Digital Unix
> 4.0 G ?
>
> NOTE - 2 Actions Carried Out :-
> 1) Increased the RAM in DB server to 4 GB from 3 GB thereby making it
Equal
> to the RAM on APP Server
> 2) Cached ALL the Packages of SYS User + Application Software Related
> Oracle Users into the shared_pool
>
> RESULT - CPU Utilization on APP Server became Equal to That on DB Server ,
> Both = 55 % Approx.
> Qs. NOT Sure which of them made the Difference
>
>
>
> > -----Original Message-----
> > From: K Gopalakrishnan [SMTP:kaygopal_at_yahoo.com]
> > Sent: Thursday, August 31, 2000 3:33 PM
> > To: VIVEK_SHARMA
> > Subject: Re: Re: Benchmark runs - Waits on enqueue , latch free - &
> > AGAIN
> >
> > Hi Vivek !!
> >
> > No problem. There is a parameter called '_kgl_bucket_count'
> > which controls the number of child latches for library cache.
> >
> > What is the current setting ( i guess it should be a PRIME number).
> > SOme times increasing this will also help
> >
> > Best Regards,
> > K Gopalakrishnan,
> > Bangalore, INDIA
> >
> >
> >
> > ----- Original Message -----
> > From: VIVEK_SHARMA <VIVEK_SHARMA_at_infy.com>
> > To: <kaygopal_at_yahoo.com>
> > Cc: <ORACLE-L_at_fatcity.com>; <oracledba_at_quickdoc.co.uk>
> > Sent: Wednesday, August 30, 2000 7:36 AM
> > Subject: RE: Re: Benchmark runs - Waits on enqueue , latch free - &
AGAIN
> >
> >
> > >
> > > Setting CURSOR_SPACE_FOR_TIME=TRUE Caused Performance to FALL
> > >
> > > NOTE - CPU Utilization on APP Server = 51 %
> > > whereas CPU Utilization on DB Server = 67 %
> > >
> > > Qs.2 What can be Done to make the CPU Utilization on APP Server
GREATER
> > than
> > > or EQUAL to CPU Utilization on DB Server ?
> > >
> > > NOTE Previously On DB Server by increasing the init.ora parameter
> > > shared_pool_reserved_size to 40 M from 10 MB the CPU Utilization
> > > on APP server shot up from 33 % to 51 % as a result
> > >
> > > Vivek Sharma
> > > Phone 080 6588668
> > >
> > >
> > > > -----Original Message-----
> > > > From: VIVEK_SHARMA
> > > > Sent: Wednesday, August 30, 2000 10:46 AM
> > > > To: 'kaygopal_at_yahoo.com'
> > > > Cc: 'ORACLE-L_at_fatcity.com'; 'oracledba_at_quickdoc.co.uk'
> > > > Subject: Re: Benchmark runs - Waits on enqueue , latch free - &
> > > > AGAIN
> > > >
> > > > NO packages pinned .
> > > > Qs.1 How to pin the SYS packages ?
> > > >
> > > > PENDING Will check out by Setting CURSOR_SPACE_FOR_TIME=TRUE &
revert
> > back
> > > >
> > > > SCRIPT :-
> > > > SQL> select owner || '.' || name OBJECT
> > > > 2 , type
> > > > 3 , to_char(sharable_mem/1024,'9,999.9') "SPACE(K)"
> > > > 4 , loads
> > > > 5 , executions execs
> > > > 6 , kept
> > > > 7 from v$db_object_cache
> > > > 8 where type in ('FUNCTION','PACKAGE','PACKAGE BODY','PROCEDURE')
> > > > 9 and owner not in ('SYS')
> > > > 10 order by owner, name
> > > > 11 /
> > > >
> > > > OBJECT
> > >
> > >
>
> --------------------------------------------------------------------------
> > > > ------
> > > > TYPE SPACE(K) LOADS EXECS KEP
> > > > -------------- -------- ---------- ---------- ---
> > > > TBAADM.LASP0003
> > > > PACKAGE 4.7 1 38 NO
> > > >
> > > > TBAADM.LASP0003
> > > > PACKAGE BODY 27.9 1 20 NO
> > > >
> > > >
> > > > SQL>
> > > > SQL> select to_char(sum(sharable_mem)/1024,'9,999,999.9') "TOTAL
SPACE
> > > > (K)"
> > > > 2 from v$db_object_cache
> > > > 3 where type in ('FUNCTION','PACKAGE','PACKAGE BODY','PROCEDURE')
> > > > 4 and owner not in ('SYS');
> > > >
> > > > TOTAL SPACE
> > > > ------------
> > > > 32.6
> > > >
> > > > NOTE the menu option Corresponding to package LASP0003 quite well
> > > > performing
> > > > Hence NO pinning may be Required
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: K Gopalakrishnan [SMTP:kaygopal_at_yahoo.com]
> > > > Sent: Tuesday, August 29, 2000 3:45 PM
> > > > To: Multiple recipients of list ORACLE-L
> > > > Subject: Re: Benchmark runs - Waits on enqueue , latch free
> > > > - & AGAIN
> > > >
> > > > Hi Vivek !
> > > >
> > > >
> > > > Still benchmarking :)
> > > >
> > > > > > RESULT - Most of the waits Occuring on "library
> > > > > cache"
> > > > > > a few waits on row cache objects & shared pool
> > > > > also exist
> > > > > >
> > > > > > Qs. How can this be Addressed ?
> > > >
> > > > Waits for library cache can be reduced (!!) if you set
> > > > the paremeter CURSOR_SPACE_FOR_TIME. But in this case
> > > > you need a little bigger shared pool size. I guess you
> > > > have pinned most of the SYS packages and heavy reload
> > > > packages in Shared Pool.
> > > >
> > > >
> > > >
> > > >
> > > > =====
> > > > With Regards !
> > > > K Gopalakrishnan
> > > > -----------------------------------------------------------
> > > > #489,EastEnd Main Road,
> > > > Jayanagar IX Block East,
> > > > Bangalore-560069, INDIA
> > > > Ph # + (91)-(80)- 6543672
> > > >
> > > >
> >
> >
> >
> > _________________________________________________________
> >
> > Do You Yahoo!?
> >
> > Get your free @yahoo.com address at http://mail.yahoo.com
Received on Tue Sep 05 2000 - 10:55:25 CDT