cyr_expire takes very long with high CPU usage

[Marcus Schopen]

Hi,

cyr_expire is started at 4:01 am and takes up to 10 minutes to clean
deliver.db (= 2.6 MB) and tls_sessions.db (460 KB) with a high CPU usage
(= load is up to 4 on a Quad-Core AMD):

mail.log:
Jul 11 04:01:00 server cyrus/cyr_expire[27651]: duplicate_prune: pruning
back 3 days
Jul 11 04:09:33 server cyrus/cyr_expire[27651]: duplicate_prune: purged
2546 out of 20281 entries
Jul 11 04:09:33 server cyrus/cyr_expire[27651]: expunged 0 out of 0
messages from 0 mailboxes

cyrus.conf:
delprune	cmd="/usr/sbin/cyr_expire -E 3" at=0401


Is that normal behavior?

Ciao
Marcus