Re: Postgres query completion status?

Richard --

You might post the results of "EXPLAIN ANALYZE <your SQL here>;" ... be sure to run it in a transaction if you want to be able roll it back. Perhaps try "EXPLAIN <your SQL>;" first as it is faster, but EXPLAIN ANALYZE shows what the planner is doing.

You wrote:

>
> P.S. Sometimes, some queries seem to benefit from being cancelled and then immediately
> re-started. As there are being run in a transaction, I can't see how this could make a difference.
> Am I missing anything obvious? Occasionally, a re-start of postgresql-8.4l itself seems to help.

This may be the result of caching of the desired rows, either by PostgreSQL or by your operating system. The rollback wouldn't effect this -- the rows are already in memory and not on disk waiting to be grabbed -- much faster on all subsequent queries.

HTH,

Greg Williamson

-- Sent via pgsql-performance mailing list (pgsql-performance(at)postgresql(dot)org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance