On 30 Apr 2017, at 13.51, Timo Sirainen <t...@iki.fi> wrote: > >> New processes aren't created until client_limit is reached in all the >> existing processes. When there are multiple processes they're all listening >> for new connections and whichever happens to be fastest gets it. Related to >> this, I'm thinking about implementing SO_REUSEPORT >> (https://lwn.net/Articles/542629/ <https://lwn.net/Articles/542629/> >> <https://lwn.net/Articles/542629/ <https://lwn.net/Articles/542629/>> >> <https://lwn.net/Articles/542629/ <https://lwn.net/Articles/542629/> >> <https://lwn.net/Articles/542629/ <https://lwn.net/Articles/542629/>>>) soon >> that would change the behavior a bit. Although its main purposes would be as >> a workaround to allow Dovecot restarts to work even though some of the old >> processes are still keeping the listener port open. > > Huh, SO_REUSEPORT was already implemented in 2013. I completely forgot about > that. Would be useful to try if it works better (or at least not worse) and > maybe change it to be enabled by default in some version. > > service ... { > inet_listener ... { > reuse_port = yes
After some testing, looks like it's not working correctly. Needs some further thinking to figure out if it can be even made to work well with Dovecot.
