Re: One tuple per transaction

Hannu Krosing <hannu@tm.ee>

From: Hannu Krosing <hannu@tm.ee>
To: Josh Berkus <josh@agliodbs.com>
Cc: Tambet Matiisen <t.matiisen@aprote.ee>, pgsql-performance@postgresql.org
Date: 2005-03-17T21:27:25Z
Lists: pgsql-performance
On L, 2005-03-12 at 14:05 -0800, Josh Berkus wrote:
> Tambet,
> 
> > In one of our applications we have a database function, which
> > recalculates COGS (cost of good sold) for certain period. This involves
> > deleting bunch of rows from one table, inserting them again in correct
> > order and updating them one-by-one (sometimes one row twice) to reflect
> > current state. The problem is, that this generates an enormous amount of
> > tuples in that table.
> 
> Sounds like you have an application design problem ...  how about re-writing 
> your function so it's a little more sensible?

Also, you could at least use a temp table for intermediate steps. This
will at least save WAL traffic.

-- 
Hannu Krosing <hannu@tm.ee>