>From MetaLink Note # 102339.1
For each session there will be a moment in time when the first sort
has to be performed. At that moment, memory is allocated for performing
that sort (sort area). The size of the sort area grows incrementally
until sufficient memory has been allocated to perform the sort or until
it reaches the maximum as specified by SORT_AREA_SIZE.
Jared
"Nelson, Allan" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
03/31/2003 07:58 AM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: RE: PGA
If it is a myth where do we find the truth?
Allan
-----Original Message-----
Sent: Monday, March 31, 2003 8:19 AM
To: Multiple recipients of list ORACLE-L
Oracle Myth #1745
"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"
--- "SARKAR, Samir"
<[EMAIL PROTECTED]> wrote: >
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 : [EMAIL PROTECTED]
> 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
> --
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.net
> --
> Author: Arvind Kumar
> INET: [EMAIL PROTECTED]
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=====
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