I had a very strange occurrence 2 days ago where autovacuum appears to
have stopped running.
I did not see any error messages in pg_log. The problem caused a file
which is usually around 50Mb but which gets updated extensively to grow
to 105GB, which in turn brought the server's performance down to
unusable levels.
Restarting Postgres got the autovacuum running again, but was just
wondering what could have cause this.
PostgreSQL 8.4.3 amd64 on FreeBSD 7.2.