Hi, Quoting Gabriele Bulfon <gbulfon@xxxxxxxxxxx>:
Hi,in the recent months I started to have performance issues on some installationsdeployed happily for many years.I tried running a reconstruct of all mailboxes during the weekend, but no results.Maybe the amount of mail is now affecting imap performance? These installations has 50-100 users, many of them keeping 2-8Gb of history. How can I get back to the normal cyrus performance? (without archiving)
It is hard to help you to fix this issues, without knowing where the bottleneck is. So lets try to find the bottleneck. If it was running fine for many years did the performance droped at one point or did it go down slowly? What has changed? More users/ larger mailboxes? Harddisk getting old and slower? Is the system swaping? What hardware does this run on? Which OS? Which filesystem?
- would reducing checkpoint from 30m to 5m help?
no, these checkpoints are only backups in case databasecorruption.
- would switching db from Berkley to Sleepycat help?
I don't know if Sleepycat is faster than Berkley DB. And i don'tknow if your bottleneck is the db-access. You can try to use skiplist for some dbs but you should combine this with a more recend version of cyrus, as the
skiplistcode has been improved in the last few versions.
- would an upgrade to 3.x help? (and would just a rebuild work without any conversion?)
I would guess that upgrading cyrus to 2.3.16 could improve your performance, nevertheless should you upgrade you cyrus version as your version is very old. Cyrus 2.3.16 has many new features i don't want to miss and many bugs have been fixed since 2.2.10
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