We have a CentOS 4.2 build running QMAIL Toaster 1.2 with
approximately 40 concurrent users and a total of around 100. Dual 3GHz
Xeons, 1GB of RAM, RAID5 with 3 147GB Ultra-320 drives. It's a beefy box.
We are having intermittent issues with plaintext imapd responding
slowly. The system is not slow, the load is no higher than 1, there is
not unusual IO. I cannot isolate it to a system or load issue, as there
is nothing else to indicate an issue.
I removed the softlimit.
tcpserver is not limiting concurrent connections.
The banner responds after anywhere from 30-120 seconds.
TERMinating all active imapd sessions causes it to recover.
I am starting to think a bug in CourierIMAP, as I am having
absolutely no luck in isolating this in any form or fashion.
Any feedback? This system needs to be bulletproof. I appreciate
any assistance!
Best regards,
--
Warner Moore
Enterprise Services
2CheckOut.com
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