On Fri, Feb 29, 2008 at 07:16:24AM +0100, Pascal Gienger wrote: > Jeff Fookson <jfookson@xxxxxxxxxxxxxx> wrote: > > > Databases are all skiplist. > > As a rule of thumb, do not use skiplist for the duplicate delivery > suppression database (deliver.db). Even if everybody hates it, use > BerkeleyDB, Version 4.4.52 or higher. Give it a quite fair amount of shared > memory. And run cyr_expunge often to prune that database so that no entry > is older than - say - 3 days. > > We have approx 10-15 messages/sec incoming on one node. I would like to add that we use skiplist for the deliver.db here with a hardware caching controller for a system with 7500 accounts and have no performance problems. It is key to run cyr_expunge to keep it pruned. Also, with your setup (software RAID + DRBD) you would benefit from the in memory nature of the BerkeleyDB format. That one change may make a significant improvement for your system. Cheers, Ken ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
