[Mongrel] Determining ideal number of Mongrels for an app?
mongrel at philip.pjkh.com
Tue Nov 28 12:03:06 EST 2006
> What's a rule of thumb for guesstimating how many
> Mongrels to use in a cluster for an app? I have an app
> that gets about 5000 unique visitors per day. I
> figured I'd give it plenty of Mongrels -- twenty to be
> specific. After running out of memory and hitting the
> swap periodically, I scaled it back to five and it
> still seems to serve up visitors fine. So, is there
> some super-secret math fomula I can use to determine
> the ideal number of Mongrels I should start in a
> cluster for an app?
Just for reference, we get about 500,000 pages a day and run 4 mongrel
processes... we've got about 20 servers, but 4 gives us the best
 We don't need 20 except for about one month a year when we do about 8
million pages a day... then they come in handy, but even then they don't
sweat that much.
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