Re: very very slow inserts into very large table
Claudio Freire <klaussfreire@gmail.com>
From: Claudio Freire <klaussfreire@gmail.com>
To: Mark Thornton <mthornton@optrak.com>
Cc: Jon Nelson <jnelson+pgsql@jamponi.net>, pgsql-performance@postgresql.org
Date: 2012-07-16T19:08:14Z
Lists: pgsql-performance
On Mon, Jul 16, 2012 at 3:59 PM, Mark Thornton <mthornton@optrak.com> wrote: > 4. The most efficient way for the database itself to do the updates would be > to first insert all the data in the table, and then update each index in > turn having first sorted the inserted keys in the appropriate order for that > index. Actually, it should create a temporary index btree and merge[0] them. Only worth if there are really a lot of rows. [0] http://www.ccs.neu.edu/home/bradrui/index_files/parareorg.pdf