Chris,
I checked with the Mail team and here's the scoop: IMAP is I/O-intensive (and especially read-intensive). It imposes a lot of load on the storage subsystem, which happens to be from a vendor called Netapp. At certain peak load times, the Netapp runs at full throttle. Through the APPR process ACNS requested funding this cycle for new hardware to provide relief. If the funding comes through they should be able to address this concern this summer.
How often do you experience one minute transaction times? What times of day? I don't do a a lot of IMAP, but when I do, performance varies, but I don't think I've seen delays that long.
/rich
On Apr 11, 2005 3:25 PM, Chris Wolf <[log in to unmask]> wrote:
Is anyone else noticing slowdowns with the mail.msu.edu servers, especially for IMAP? We aren't hearing complaints from our POP users, but at least two of us using IMAP have been experiencing unusual delays in ordinary mail operations for the last month or more, and they've gotten even worse today. Just trying to do something simple such as opening a message to read it, deleting a message, or replying to a message creates a delay of anywhere from ten seconds up to a minute or more. These operations used to take no more than two or three seconds.
--Chris
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Chris Wolf Computer Service Manager
Agricultural Economics [log in to unmask]
Michigan State University 517 353-5017
