Re: sos on cyrusimapd

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: [email protected]
> > 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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