Michael Nguyen wrote:
What else can I look for? Is there anything other logging I can setup
to prepare for the next time it happens?
Well, since it's affecting IMAP and not POP3, it's probably FAM related.
I'm speculating right now, but if you're doing virtual hosting, and all
users have the same UID, then gamin might run out of FDs when a lot of
users are logged in and have multiple folders open.
The next time you see this happen, look for a process named
"gam_server", and figure out how many files it has open. You can look
in /proc/<pid>/fd, or use "lsof" to find out.
If it's got 1024 files open, it's hit its limit. You've got some
options if this is the problem. Some are:
1) Increase the max files per user. Add the following line to the
/etc/security/limits.conf file:
* - nofile 8192
2) Turn off enhanced idle, so you no longer use FAM.
3) Replace gamin with sgi_fam and portmap.
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