db log.* files?

[Amos]

OK, the log.* files in the db, db.backup1, and db.backup2 directories
are related to BerkeleyDB, right? They're the result of updates not
being "committed", right? So why do they not get cleared out when
"ctl_cyrusdb -c" is run? It seems as if I'm getting an ever growing
number of these log.* files, but yet do not seem to be getting any
more error syslog messages than usual. The only safe way to clear
these out is to shutdown Cyrus, right?

Thankfully mailboxes.db is skiplist.

Amos