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Re: [Bizgres-general] Re: faster INSERT with possible

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Cc: "Luke Lonergan" <llonergan(at)greenplum(dot)com>,"Hannu Krosing" <hannu(at)skype(dot)net>,"John A Meinel" <john(at)arbash-meinel(dot)com>,"Dan Harris" <fbsd(at)drivefaster(dot)net>,"bizgres-general" <bizgres-general(at)pgfoundry(dot)org>
Subject: Re: [Bizgres-general] Re: faster INSERT with possible
Date: 2005-07-27 16:29:09
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance

> Well - now that I test it, it appears you are correct, temp table COPY
> bypasses WAL - thanks for pointing it out!

RIght.  The problem is bypassing WAL for loading new "scratch" tables which 
aren't TEMPORARY tables.   We need to do this for multi-threaded ETL, since:
a) Temp tables can't be shared by several writers, and
b) you can't index a temp table.

Josh Berkus
Aglio Database Solutions
San Francisco

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