Oracle-L: RE: PGA

From: SARKAR, Samir <Samir.SARKAR_at_nottingham.sema.slb.com>
Date: Mon, 31 Mar 2003 02:53:36 -0800
Message-ID: <F001.00576146.20030331025336@fatcity.com>

Arvind,

When u set the sort_area_size for a database, it will allocate that much memory PER USER
for any sort operation being performed on the database. In practice, it means that if u allocate
too high a value for the sort_area_size and multiple users are performing multiple sorts, the Unix
system may run out of memory and Oracle will return u a process memory error.

For eg. if u have ur sort_area_size as 100MB and u have 10 users performing sort operations
on the database, Oracle will take up 100*10 MB memory. This might degrade ur system performance.

Samir

Samir Sarkar
Oracle DBA
SchlumbergerSema
Email : ssarkar2_at_slb.com
Phone : +44 (0) 115 - 957 6028
EPABX : +44 (0) 115 - 957 6418 Ext. 76028 Fax : +44 (0) 115 - 957 6018

-----Original Message-----
Sent: 31 March 2003 11:04
To: Multiple recipients of list ORACLE-L

hello all,

how does increasing the value of SORT_AREA_SIZE affect the unix system perfomance.

Thanks
Arvind
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Author: Arvind Kumar
INET: arvindk_at_sqlstarintl.com

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Author: SARKAR, Samir
INET: Samir.SARKAR_at_nottingham.sema.slb.com

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