A colleague asked me a question yesterday to which I don't really have a
good answer; so I thought I'd crowdsource it.
Given a RAC database of N instances each with an SGA of M gb in size. When
changing the instance count N how, if at all, do you modify the value of M?
What metrics do you look at, and what is the rationale behind that.
I'm aware that "let it run for a while and use the memory advisors" is an
approach - I can't say I have a lot of confidence in the memory advisors
from past experience.
--
Niall Litchfield
Oracle DBA
http://www.orawin.info
