> On Tue, Nov 28, 2006 at 11:03:06AM -0600, Philip Hallstrom wrote: >>> 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? >> >> http://mongrel.rubyforge.org/docs/how_many_mongrels.html >> >> Just for reference, we get about 500,000 pages a day and run 4 mongrel >> processes... we've got about 20 servers[1], but 4 gives us the best >> performance. > > I'm curious - do you have 4 * 20 Mongrels or just 4? How many > requests/sec does Rails report in your logs?
We have 4 mongrels per server. Just did a quick grep on one of the servers log files and for about 6000 requests we are averaging 38 reqs/sec with a standard deviation of 113. If I throw out about 2700 requests that I know are slow (< 5 req/s mostly cause we can't cache them) the average goes to 65 reqs/sec. Like I said, we only need those for a little bit every year... during the world series of poker. People really like there poker :) http://www.alexaholic.com/cardplayer.com+penny-arcade.com+basecamphq.com -philip _______________________________________________ Mongrel-users mailing list Mongrel-users@rubyforge.org http://rubyforge.org/mailman/listinfo/mongrel-users
