Re: No hash join across partitioned tables?
Kris Jurka <books@ejurka.com>
From: Kris Jurka <books@ejurka.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Date: 2009-04-17T17:05:32Z
Lists: pgsql-hackers, pgsql-performance
Attachments
- hash.txt (text/plain)
- merge.txt (text/plain)
- nestloop.txt (text/plain)
Tom Lane wrote: > Kris Jurka <books@ejurka.com> writes: >> The hash join takes less than twenty seconds, the other two joins I >> killed after five minutes. I can try to collect explain analyze results >> later today if you'd like. > Attached are the explain analyze results. The analyze part hits the hash join worst of all, so I've also included the timings without analyzing. Method Time (ms) Time w/Analyze (ms) nestloop 304853 319060 merge 514517 683757 hash 18957 143731 Kris Jurka