I had a chance to go through the Hash join code of Postgresql and had the
- Currently postgres takes the heaptuple from the slot and creates and
minimal_tuple and copies it into the temp file.
I think the creation of minimal_tuple in the middle is a overhead which can
be avoided by creating a mem-map and directly creating the minimal_tuple in
the mem-map. Since Hash join is used mainly to join huge tables, this might
benefit those warehouse customers of postgres.
Am i missing something???
pgsql-hackers by date
|Next:||From: Andrew Dunstan||Date: 2008-03-25 22:03:39|
|Subject: Re: gcc 4.3 breaks ContribCheck in 8.2 and older.|
|Previous:||From: Jeff Davis||Date: 2008-03-25 20:28:47|
|Subject: Re: PostgreSQL Replication with read-only access tostandby DB|