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
I think the one you're bumping your head on is: kern.ipc.maxsockbuf but you shouldn't crank it up by itself. On 06/27/2018 10:09 AM, Albert Shih wrote:
Hi everyone, 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: j...@obspm.fr 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
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