successful create but unsuccessful subscribe
frank.elsner at tu-berlin.de
Fri Dec 21 07:19:43 EST 2012
On Wed, 19 Dec 2012 13:45:36 -0800 (PST) Andrew Morgan wrote:
> On Wed, 19 Dec 2012, Frank Elsner wrote:
> > On Wed, 19 Dec 2012 10:10:43 -0800 (PST) Andrew Morgan wrote:
> > [ ... ]
> >> I don't know why, but we have always operated with prefork=1 here. As far
> >> as I can tell, it never runs more than 1 mupdate process. That single
> >> mupdate process has 15 connections in total from our 3 frontend servers.
> >> There doesn't seem to be a need for it to spawn additional mupdate
> >> processes. Now that I look closer, I see that mupdate is threaded...
> >> We have 3 frontends and 3 backends. Each backend has about 20,000 users
> >> on it.
> >> Here is my cyrus.conf entry on the mupdate master:
> >> mupdate cmd="/usr/local/cyrus/bin/mupdate -m" listen="3905" proto="tcp4" prefork=1
> >> and on the frontends:
> >> mupdate cmd="/usr/local/cyrus/bin/mupdate" listen="3905" proto="tcp4" prefork=1
[ ... ]
> > Ok, sounds good. On the mupdate master we already have the mupdate_* settings.
> > Shall we put mupdate_* settings into the imapd.conf on the frontends too?
> I have never set those on either mupdate master or frontends, although I
> have the defaults in imapd.conf commented out. At least here with our
> systems, the defaults seem to be working well.
We have tested with "mupdate ... prefork=1" on master and frontend(s) and it started
ok, but we are facing an other problem:
On our RHEL system we have encreased the limit on processes and open files for the user
"cyrus" in /etc/security/limits.de/cyrus-imapd.conf by the lines
cyrus soft nproc 3072
cyrus soft nofile 8192
cyrus hard nofile 8192
and we put a "ulimit -u 3072 -n 8192" right before the start of cyrus-master in
The running cyrus-master has these limits but the mupdate process only has 256 open files
allowed. This leads to
Dec 20 11:44:34 mupdate-2 mupdate: accept failed: Too many open files
Dec 20 11:52:19 mupdate-2 mupdate: socket: Too many open files
Any pointer towards a solution is welcome.
Just for the records: The mupdate master has this legacy settings
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