Oracle-L: RE: help

From: Goulet, Dick <DGoulet_at_vicr.com>
Date: Tue, 01 Apr 2003 07:58:39 -0800
Message-ID: <F001.00577154.20030401075839@fatcity.com>

Arvind,

Try cutting DB_BLOCK_BUFFERS in half. Yeah it's a strange concept, but if the swapper is running them giving back some memory to the system may stop it & the improvement in response time will more than make up for the additional wait in getting data into the cache.

Dick Goulet

-----Original Message-----
Sent: Tuesday, April 01, 2003 3:04 AM
To: Multiple recipients of list ORACLE-L

its a single instance system..here is some more details ...pls suggest if something needs to be corrected

   SHARED_POOL_SIZE=190MB
   DB_BLOCK_SIZE = 4KB
   DB_BLOCK_BUFFERS = 125000 (488MB)
   LOG_BUFFER = 5MB

   SORT_AREA_SIZE = 2MB
   SORT_AREA_RETAINED_SIZE = 1MB
   DB_WRITER_PROCESSES =4

LOG_ARCHIVE_MAX_PROCESS = 3 AND THE MOST WAITED EVENT IN V$SYSTEM_EVENT IS 'DB_FILE_SCATTERED_READ' ,TO REDUCE ITS WAIT
TIME I HAVE INCREASED THE DB_FILE_MULTIBLOCK_READ_COUNT FROM 16 TO 64 ,BUT STILL SWAPPING SIZE IS SAME FROM 'TOP' COMMAND IN UNIX Regards
Arvind

-----Original Message-----
Sent: Monday, March 31, 2003 10:19 PM
To: Multiple recipients of list ORACLE-L

Hi!

You didn't send your SHARED_POOL_SIZE parameter value...
but...

usually, when the machine swaps is due to not enough memory allocated!

I would check your shared_pool_size, sort_area_size, and db_block_buffer for verifying that there's enough memory asigned.

Of course, you should diagnose memory problems on your OS and Oracle.

HTH
JL

Arvind Kumar <arvindk_at_sqlstarintl.com> wrote:
>
> Hello all,
>
> i am facing swapping problem ..below is the
> details
>
>
> System - IBM RS 6000, two CPU,2GB RAM,AIX 4.3,4GB
> SWAP SPACE
>
> DATABASE - ORACLE 8i 8.1.5, SGA 800MB, BUFFER
> CACHE HIT RATIO IS ABOVE
> 93%
>
> Now the problem is of swapping there are about 70
> oracle users using this
> database ,swap utilization is always above 1.5gb.
>
> what could be the problem...
>
>
> Thanks
> Arvind Kumar
> --
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.net
> --
> Author: Arvind Kumar
> INET: arvindk_at_sqlstarintl.com> (by way of Jared
> Still <jkstill_at_cybcon.com
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Author: Goulet, Dick
  INET: DGoulet_at_vicr.com

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Received on Tue Apr 01 2003 - 09:58:39 CST