POP3 "list" performance

[Tor-Einar Jarnbjo <To...@Jarnbjo.name>]

Hi,

I decided to change my mail server to James a few days ago, to be able 
to use homemade Mailets, and except for a single problem, everything 
seem to work more or less as expected.

I've configured James to use a local MySQL database as message store 
(including the message body in the database) and even if access to the 
database seem more than performant enough, issuing the LIST command 
through POP3 slows down incredibly, as soon as I have a few hundred 
messages in by mailbox. At the moment, I have about 500 messages in my 
mailbox with a total size of about 4MB. Using the MySQL client to dump 
the inbox entries for my mailbox to a file takes 100-150ms, issuing the 
LIST command to the POP3 server takes about 25 seconds. During the 
execution of the LIST command, both the James process, as well as MySQL 
are only using a few % of the CPU each.

Is there any obvious reason for this kind of behaviour or anything I can 
do to find out what's going wrong?

Regards,

Tor-Einar



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