Re: way to make sql statement stay on cache (SGA) logner?
- From: Surachart Opun <surachart@xxxxxxxxx>
- To: mccdba1@xxxxxxxxx
- Date: Mon, 1 Feb 2010 08:48:10 +0700
If that is SQL Statement, do it to be Procedure and pin in shared pool.
You can find out on Oracle Docs by search "pin sql"
DBMS_SHARED_POOL.KEEP to pin your objects.
This procedure ensures that your system does not run out of shared memory
before the objects are loaded. By pinning the objects early in the life of
the instance, you prevent memory fragmentation that could result from
pinning a large portion of memory in the middle of the shared pool.
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_shpool.htm
some example: http://surachartopun.com/2008/02/oracle-pinnig-objects.html
Good Luck
Surachart Opun
http://surachartopun.com
On Mon, Feb 1, 2010 at 6:17 AM, dba1 mcc <mccdba1@xxxxxxxxx> wrote:
> We have ORACLE 10GR2 on UNIX server and some of SQL statements run much
> longer on first after that it only run few seconds. I know the reason first
> time SQL statements run need parse and other things, after that SQL
> statement on cache (SGA) and it will run shorter. But eventually SQL
> statement still will be age out from SGA.
>
> Does there has way to make SQL statement stay longer on cache (SGA)?
>
> Thanks.
>
>
>
>
> --
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