On Mon, 2011-03-07 at 19:03 +0200, Thierry de Montaudry wrote: > >>>>> Mar 7 11:19:51 xxx dovecot: pop3-login: Error: net_connect_unix(pop3) > >>>>> failed: Resource temporarily unavailable > > .. > As it is happening at least once a day, is there anything I can do to trace > it? and whatever I'll do, will it slow down those machines?
Set verbose_proctitle=yes (won't slow down) and get list of all Dovecot processes when it happens. And check how much user and system CPU it's using and what the load is.
