On 04 Apr 2009, at 09:19, Gary Mills wrote: > What about imapd and pop3d daemons, which also consume resources? > Are limits a good idea here too? Users will complain to the help > desk when those limits are reached, of course. Can the msg/shutdown > file be used to control imapd processes in a nicer manner? I typically set the lmtpd limits very low, i.e., just above provisioned demand, because, as you say, inbound mail can queue. Setting imapd & popd limits at somewhat higher than peek demand causes a fairly user friendly service degradation: mail delivery more or less stops, mail reading can continue, but that too will stop before load is so bad that nothing can be done. I also tend to actively monitor server load, so in extreme situations I can, e.g., stop or severely limit mail delivery or other lesser services to favor more important services. At some point, tho, you just need to add more capacity. :wes ---- 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
