How bad is your performance with imapcopy? I've never had 'fast' performance with IMAP.
-Patrick On Fri, 4 Nov 2005, John Madden wrote:
I've had great experience with the performance of Cyrus thus far, but I'm testing a migration at the moment (via imapcopy) and I'm having some pretty stinky results. There's no iowait (4 stripes on a 2Gbps SAN), no cpu usage, nothing waiting on the network, and still I'm seeing terrible performance. I assume this points to something internal, such as concurrency on the db files. I've converted everything to skiplist already, I've tweaked reiserfs's mount options, what little Berkeley still used appears to be ok (no waiting on locks and such), so I'm at a loss. Is there a general checklist of things to have a look at? Are their tools to look at the metrics of the skiplist db's (such as Berkeley's db_stat)? Am I doomed to suffer sub-par performance as long as IMAP writes are happening? Migration's coming on the 24th. I'm now officially sweating. :) Thanks, John -- John Madden UNIX Systems Engineer Ivy Tech Community College of Indiana [EMAIL PROTECTED] ---- Cyrus Home Page: http://asg.web.cmu.edu/cyrus Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
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