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Re: Posix Shared Mem patch

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Josh Berkus <josh@agliodbs.com>
Cc: Robert Haas <robertmhaas@gmail.com>, Magnus Hagander <magnus@hagander.net>, Andres Freund <andres@2ndquadrant.com>, pgsql-hackers@postgresql.org, Thom Brown <thom@linux.com>
Date: 2012-06-29T18:14:29Z
Lists: pgsql-hackers 
Josh Berkus <josh@agliodbs.com> writes:
>>> 10% isn't assuming dedicated.

>> Really?

> Yes.  As I said, the allocation for dedicated PostgreSQL servers is
> usually 20% to 25%, up to 8GB.

Any percentage is assuming dedicated, IMO.  25% might be the more common
number, but you're still assuming that you can have your pick of the
machine's resources.

My idea of "not dedicated" is "I can launch a dozen postmasters on this
machine, and other services too, and it'll be okay as long as they're
not doing too much".

			regards, tom lane