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Dividing a UNIX server's memory between OS and SGA

gpafogartyJul 6 2012 — edited Jul 6 2012

I have a UNIX server running AIX. It has 4 cpus with a total of 16 GB of memory. How do I determine how much memory needs to be left to run the operating system? What is left over will be split between the SGAs and PGAs of four Oracle instances.

I have read Oracle's concepts, tuning, and reference manuals on the subject of allocating memory to the SGA and PGA. I do not want to know how to set those parameters. I just want to know how much of my 16 GB to leave to meet the needs of the operating system.

If you can point me to a reference, I would appreciate that. If you can tell me of your personal experience with this, I would appreciate that too.

Thanks,
Bill

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Locked on Aug 3 2012

Added on Jul 6 2012

#general-database-discussions, #memory

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