rspamd bayes not working under heavy load

[marc perkel]

Seeing these errors:

backend of type sqlite3 does not exist

spam and ham classes are both overflowed

Restarting the service clears the error for a few minutes.

Maybe I'm doing something unusual. My system is a little different.

I detect most spam/ham with Exim rules and maybe 2% sees rspamd. So to make bayes smater I run rspamc to learn a little of the extreme spam/ham I detect with Exim. This can spawn dozens of rspamc learn processes at once.

For what it's worth I had the same problem with SpamAssassin until they started using redis as a backend. Redis was the only backend that could deal with the load.