From: pSeries AIX Geek (aixgeek@YAHOO.COM)
Date: Mon Mar 24 2003 - 17:07:33 EST
Thanks -- this formula was exactly what I was looking
for (I couldn't find it in the archives or in google
because I tend to "overthink" my queries and have
horrible search terms).
I know all the issues surrounding paging space
incantations and formulations -- I just was looking
for the "512MB + (memory size - 256MB) * 1.25"
formula.
Thanks, Simon.
--- "Green, Simon" <Simon.Green@EU.ALTRIA.COM> wrote:
> Sorry to be the bearer of bad news, but all of the
> RoT I know about are
> horribly out of date, referring back to the days
> when memory was measured in
> MBs and before the advent of late memory allocation.
>
> The simplest one I know of is 2*Memory or 512MB,
> whichever is less. (That's
> from the System Management Concepts manual.) You
> may also come across:
> total paging space = 512MB + (memory size - 256MB) *
> 1.25
>
> ...but that may be a bit silly for really large
> amounts of memory.
>
>
> But it really is so incredibly application dependent
> that it's impossible to
> come up with a meaningful RoT.
>
>
> For searching, you may find that Google is more
> useful. A basic search for
> "aix paging size algorithm" gives some decent
> results. Don't forget the
> Groups tab. comp.unix.aix covers much the same
> ground as this list.
>
> Simon Green
> Altria ITSC Europe s.a.r.l.
>
> AIX-L Archive at
> http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
> AIX FAQ at http://www.faqs.org/faqs/aix-faq/
>
> N.B. Unsolicited email from vendors will seldom be
> appreciated.
>
>
> > -----Original Message-----
> > From: pSeries AIX Geek [mailto:aixgeek@YAHOO.COM]
> > Sent: 23 March 2003 04:07
> > To: aix-l@Princeton.EDU
> > Subject: Rule-of-thumb paging size algorithm
> >
> >
> > OK, so I've been through this list's archives with
> no
> > success (I can't ever think of the best search
> terms
> > to use).
> >
> > I know that there was a thread that discussed the
> best
> > "rule-of-thumb" starting place for allocating
> paging
> > space given the amount of memory you have.
> >
> > [Yes, I know that it's all application-dependent,
> and
> > in a perfect world, you'd have no paging. I'm not
> > interested in those discussions, just the simple
> > initial formulae that were provided.]
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