IMAP processes out of control
morgan at orst.edu
Tue Sep 22 17:17:44 EDT 2015
On Tue, 22 Sep 2015, Shaheen Bakhtiar wrote:
> It happened again….. although it took longer for it to happen, this has
> been happening only since the upgrade in Jun.
> The number of imap processes continues to increase until the server is
> completely OOM. the increase is drastic and all of a sudden.
You should probably set maxchild to a value that won't run your server out
of memory. :)
Have you looked at the processes to see what they have in common? For
example, sometimes an IMAP client will run amok and make hundreds or
thousands of connections. Or perhaps the processes are all stuck waiting
on a lock, etc.
lsof, strace, netstat, and your Cyrus logs can help a lot.
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