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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Combined SGA size and Total Memory
Ugh, 30% of memory would be such a waste of expensive physical Ram.
70-75% of your physical ram for Oracle is fine, assuming you've got ample swap space and no other applications on the machine.
If you let 9i dbca default all its values, it assumes 70% as a target. This is as good of a "rule of thumb" as any.
Todd
>
> Hello,
>
> A fellow DBA tells me that the total SGA size of all instances on the serve=
> r (HP, Sun) should not exceed 30% of the server's total memory. I
> could not find any documentation supporting this argument in Metalink? Is t=
> here is any such guideline? My impression was to monitor the
> paging/swap on the server before adding more memory rather than going by th=
> e rule of thumb....=20
>
> Thanks in advance for your input.
>
> Biju Thomas
>
>
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