"Benjamin Krajmalnik" <kraj(at)illumen(dot)com> writes:
> While checking our server, I noticed quite a few files in the pg_clog
> directory.
> Is there a maintenance task which can be run to purge the files which
> are no longer needed?
VACUUM. If they're not disappearing, you aren't running an adequate
vacuum regime --- missing out some databases, perhaps?
regards, tom lane