L.S.,
We're running Cyrus IMAP/POP server for apx. 30 users, which has been in
production since december and we've slowly been migrating users to it.
The system is a SunFire V120, Solaris 9, and the Cyrus version is
2.1.10. We use Berkley-DB 4.1.24 with it.
Cyrus has been configured like this:
./configure --with-perl=/bin/perl --with-sasl=/usr/local
--with-cyrus-prefix=/usr/local/cyrus
--with-dbdir=/usr/local/BerkeleyDB.4.1 --with-auth=unix
Now if you take a look at the three graphs located in
http://home.sara.nl/~boven/plaatjes you will notice the repeating spikes
when ctl_cyrusdb is run. These grow bigger and bigger (ctl_cyrusdb takes
longer to complete while using all CPU resources), and the
database-checkpointing is causing a much higher overall load on the
system than the actual mail-filtering and serving. And then suddenly the
checkpointing is done within seconds again, and the cycle repeats itself.
I would appreciate any hints on what is going wrong here (if anything),
and how the performance of the checkpointing could be improved without
losing the ability to recover the database.
Regards, Paul Boven.
