--On 19 November 2008 16:58:45 +0100 Jacco Rens <jacco@xxxxxxxxxxxxx> wrote: > Hello, > > I'm currently running Apple's Mac OS X Server as mail server for about > 100 users. The current setup has problem keeping up with all those > users, since cyrus is limited to 300 sessions. This is an operating system limitation, which you can change. In OSX 10.5, the hard coded system limit on processes is 2500, and you can set a sensible per user limit of, say, 2300. For 10.4 the hard coded limit is 2068 (yes, really, not 2048). To change the limits, create /etc/sysctl.conf, and insert these lines: kern.maxproc=2500 kern.maxprocperuid=2300 > The mail client in use > opens 4 sockets per account, so there are quite often time-outs or > password errors during office time. Actually, Apple Mail will open far more than 4 connections. It'll open one per mailbox. I don't understand this design choice - especially in the context of the server process limit above. Perhaps they just want to sell more servers. > Now I want to look into solving > this issue, without investing in new hardware. I can run VMware, with > 2 or 3 more virtual Mac OS X Servers. That's an interesting approach, but try increasing your process limits first. I've been supporting 12000 users on four physical hosts, but have just increased that to six. > Would the cyrus murder function help me here? It would, if you really need multiple hosts. > Can anyone advice what could help? > > Best, > > Jar. > ---- > Cyrus Home Page: http://cyrusimap.web.cmu.edu/ > Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki > List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html -- Ian Eiloart IT Services, University of Sussex x3148 ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
