Thank you very much for your help, I cross mi fingers but it seems that this was the problem.
Fabio Ferrari > On 26.10.2012, at 13.24, FABIO FERRARI wrote: > >> Hi all, >> >> we have a problem about anvil, it seems that when we have a high load >> the >> dovecot stops to work. Sometimes it is sufficient to make a dovecot >> reload, but sometimes we have to restart it. >> >> Oct 26 11:13:55 anvil: Error: net_accept() failed: Too many open files > > This is the problem. > >> And these are the limit settings in the OS: >> * soft nofile 131072 >> * hard nofile 131072 >> >> Have someone had the same problem? > > The OS limits are ok. But you need to make sure that the dovecot processes > have enough fds in ulimit. You can check the limits with: > > cat /proc/<pid of anvil process>/limits > > The "Max open files" soft limit is what you're most likely hitting. Use > "ulimit -n 10000" or something before running dovecot binary. And make > sure that it changes the limit in the proc. Many init scripts change the > ulimit internally. > >
