"David logan" <
djlogan2@...> writes:
> (The question is why this simple select takes me 20 minutes to run...)
What have you got work_mem set to? The hash join is not going to be
real fast if it has to split the join into multiple batches, so you
want work_mem large enough to hold the whole inner relation. That would
be at least 20MB in this example, probably quite a bit more after
allowing for per-row overhead in the table.
regards, tom lane
--
Sent via pgsql-performance mailing list (
pgsql-performance@...)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
