On Qua, 2009-09-30 at 23:23 +0200, Patrick Ben Koetter wrote: > * Jose Celestino <j...@co.sapo.pt>: > > On Qua, 2009-09-30 at 17:08 +0200, Patrick Ben Koetter wrote: > > > Has anybody ever bothered to measure how many concurrent IMAP sessions > > > dovecot > > > can handle? > > > > > > I know it depends on hardware, filesystem, mailbox type etc., but what > > > exactly > > > controls the number and what have people on the list measured? > > > > > > > We have about 3600 per server. > > Any headroom left or is this the maximum you can get? >
Plenty of headroom still. 8 CPUs, 4GB of ram servers. There are some occasional spikes of load of 2 or 3 because of i/o to the NFS but nothing to worry about. I guess that we could easily take them to 5k concurrent IMAP sessions. But, and this is worth mentioning, this are mostly sessions coming from imapproxy so many of them are being kept by the proxy with no real activity. -- Jose Celestino SAPO.pt::Systems http://www.sapo.pt --------------------------------------------------------------------- * Progress (n.): The process through which Usenet has evolved from smart people in front of dumb terminals to dumb people in front of smart terminals.
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