Thanks Paul, I'll up to 450 and see how we go. Our pop3 box is a quad xeon with 4gb of ram, the DB backend is a dual quad xeon with 16gb of ram using mysql.
Which leads me to another question. It seems for good reason that people running larger setups are preferring postgres, is there anyone out there running over 6k users (mixed pop3/imap) on a mysql setup? What sort of numbers can we expect from this combination of hardware. We're already planning to scale the setup with a separated backend for new users and perdition to map the pop3/imap services so we're not worried about scaling, but i'd be interested to hear of people running higher than 6k users in mysql and what hardware theyre using. Jon > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Paul J Stevens > Sent: 16 June 2009 21:47 > To: DBMail mailinglist > Subject: Re: [Dbmail] MAX_CHILDREN > > > The hardcoded ceiling was aimed at avoiding overloading the database > server. You can change the value and recompile if you like. > > It does make me curious what hardware are you on anyway? > > Wish I had a good load tester for pop3... > > > > Michael Monnerie wrote: > > On Dienstag 16 Juni 2009 Jon Duggan wrote: > >> MAX_CHILDREN limit of 300 in pop3 > > > > Are you sure your box has enough RAM to keep 300 pop3 daemons around, > > plus the memory they need during I/O? Maybe it'd be better to install > a > > 2nd box? If your machine is already swapping, more processes with > > actually lower your throughput. > > > > If the average pop3 user can receive with 100KB/s, your machine would > > need 30.000 KB/s (about 30Mb/s) Internet connection, and of course > your > > database (same server? or another?) needs to be fast enough also. > Sure > > you don't hit an I/O limit somewhere? > > > > Not want to offend, just help. But I don't know for the 300 limit in > the > > code. > > > > mfg zmi > > > -- > ________________________________________________________________ > Paul Stevens paul at nfg.nl > NET FACILITIES GROUP GPG/PGP: 1024D/11F8CD31 > The Netherlands________________________________http://www.nfg.nl > _______________________________________________ > DBmail mailing list > [email protected] > http://mailman.fastxs.nl/cgi-bin/mailman/listinfo/dbmail _______________________________________________ DBmail mailing list [email protected] http://mailman.fastxs.nl/cgi-bin/mailman/listinfo/dbmail
