> Because 'maintenance' operations were rarer, so we figured we could use
> more memory in those cases.
Once we brought Autovacuum into core, though, we should have changed that.
However, I agree with Magnus that the simple course is to have an
autovacuum_worker_memory setting which overrides maint_work_mem if set.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com