RE: How big SGA for 32GB RAM

  • To: "Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx>, <don@xxxxxxxxx>, "oracle-l" <oracle-l@xxxxxxxxxxxxx>
  • Date: Thu, 18 Jan 2007 16:15:43 -0500

Thanks for the email, We are in process of deploying on this new
hardware and it is always good to know the max that we can go or
recommended to go and this was just an starting config, all the
parameters will be setup on all the factors you mentioned and the
application design itself.

"I was looking for a federal limit on the max speed"

-----Original Message-----
From: Allen, Brandon [mailto:Brandon.Allen@xxxxxxxxxxx] 
Sent: Thursday, January 18, 2007 4:11 PM
To: don@xxxxxxxxx; Harvinder Singh; oracle-l
Subject: RE: How big SGA for 32GB RAM

Don and Harvinder, I recommend you both take a look at
v$db_cache_advice, your wait events (from statspack, AWR, or
v$session_event and v$system_event) and even the old buffer hit ratio
and then after taking all that into account, make an informed decision
based on your findings rather than sizing your SGA/buffer cache based on
how much RAM you have.  The question asked is analagous to asking:

"My car can go 180mph, how fast should I drive?"

Regards,
Brandon

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