On Mar 22, 2013, at 8:38 AM, David Thacker wrote: > Greetings all, > > I have a recurring problem where Dovecot chokes under heavy load (login > break-in attempts) and has to be manually restarted. The problem used to > happen once or twice a month, but lately happens at least once a day and > is now a reliability problem for my hosting clients.
I get these, too, although not with as much regularity. I put dfix in place from Solarspeed's free bundle: http://www.solarspeed.net/blueonyx/free-products/free-bundle.html It does a remarkable job at stopping these. > I do have the Security > Login Manager > Host rule set to 30/h but it > doesn't solve it. > > I will get an Active Monitor texted to my phone within 15 minutes of > Dovecot choking, but if it happens overnight it can be several hours > before I notice and can correct it. > > The problem reported in the mail logs is this: > > Error: net_connect_unix(anvil) failed: Too many open files > > which is exactly as this poster described on the Dovecot mailing list > here: > > http://dovecot.org/list/dovecot/2012-October/069070.html > > A response to that post offered this suggested solution: > > http://dovecot.org/list/dovecot/2012-October/069111.html > > which was to increase the max open files allowed for the Dovecot process. > > On my system when I "cat /proc/<pid of anvil process>/limits" I get: > > Max open files 4096 4096 > files > > So, I stopped & killalled Dovecot, then did "ulimit -n 8192" and then > "service dovecot restart", and when I check again, I still see max open > files 4096 instead of 8192. > > > 1. Can anyone help me figure out how to increase the max open files that > Dovecot anvil has to work with, to see if this will solve the heavy-usage > choking problem? > > or > > 2. Can anyone suggest a way that the Active Monitor script that recognizes > that "The POP server is not running and could not be restarted" could be > modified to actually restart Dovecot on its own so I don't have to do it > manually? > > > Regards, > > dAvid tHacker Email: da...@thackernet.com > Thacker Network Technologies Inc. http://www.ThackerNet.com > > _______________________________________________ > Blueonyx mailing list > Blueonyx@mail.blueonyx.it > http://mail.blueonyx.it/mailman/listinfo/blueonyx _______________________________________________ Blueonyx mailing list Blueonyx@mail.blueonyx.it http://mail.blueonyx.it/mailman/listinfo/blueonyx
