Le 27/06/2018 à 11:27:48-0400, Eric W. Bates a écrit > Yah. You need to crank up some buffer sizes. > > This is an excellent document (written for FreeBSD 10): > https://calomel.org/freebsd_network_tuning.html Yes I already find that page > > I think the one you're bumping your head on is: > kern.ipc.maxsockbuf but the problem is It's already high according to what netstat -m say I got [root@zenobe /usr/home]# sysctl -a kern.ipc.maxsockbuf kern.ipc.maxsockbuf: 2097152 [root@zenobe /usr/home]# netstat -m 35091/25314/60405 mbufs in use (current/cache/total) 33072/11170/44242/12180860 mbuf clusters in use (current/cache/total/max) 33072/7914 mbuf+clusters out of packet secondary zone in use (current/cache) 1254/4242/5496/6090429 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/1804571 9k jumbo clusters in use (current/cache/total/max) 0/0/0/1015071 16k jumbo clusters in use (current/cache/total/max) 79932K/45636K/125569K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters) 0/0/0 requests for jumbo clusters delayed (4k/9k/16k) 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 0 sendfile syscalls and both mbufs denied/delayed are at 0. > > but you shouldn't crank it up by itself. Do you think I should still increase that maxsockbuf ? Do you have anything special tweaking you kernel ? Regards. > > > > So today I switch all my user from my old server to the new one running > > cyrus-imapd 3.0.7 with FreeBSD 11.1-p11. > > > > The server get 192Go of Ram. > > > > Currently I got lot of disconnection from MUA (mutt), the client going to > > keep the connection during let's say few minutes and then I lost the > > connection (nothing to do with the network). > > > > If I relaunch just after de disconnection, I can get > > > > back maibox pretty quickly, > > back maibox very slowly > > connection error (strange SSL I/O error on the client) > > > > On the server I didn't see lot of message, only this strange > > > > onewconn: pcb 0xfffff8276c40e570: Listen queue overflow: 49 already in queue awaiting acceptance (209 occurrences) > > > > knowing I'm not able to find the pcb fffff8276c40e570 with netstat or lsof, > > event it not change in time. > > > > I guessing I mis configure something...but what ? > > > > I know the server are under heavy load because all my user's client are > > re-synchronize their mailbox. But well It's not very good... > > > > Is anybody running cyrusimapd on FreeBSD have tuning some special variable > > in the kernel through sysctl ? > > > > Regards > > > > -- > > Albert SHIH > > Observatoire de Paris > > xmpp: jas@xxxxxxxx > > Heure local/Local time: > > Wed Jun 27 16:03:10 CEST 2018 > > ---- > > Cyrus Home Page: http://www.cyrusimap.org/ > > List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ > > To Unsubscribe: > > https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus > > > > ---- > Cyrus Home Page: http://www.cyrusimap.org/ > List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ > To Unsubscribe: > https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus -- Albert SHIH DIO bâtiment 15 Observatoire de Paris 5 Place Jules Janssen 92195 Meudon Cedex France ☏ +33 1 45 07 76 26/+33 6 86 69 95 71 xmpp: jas@xxxxxxxx Heure local/Local time: Wed Jun 27 17:41:04 CEST 2018 ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
