Re: Optimizing DELETE

Ivan Voras <ivoras@fer.hr>

From: Ivan Voras <ivoras@fer.hr>
To: Rod Taylor <rbt@rbt.ca>
Cc: pgsql-performance@postgresql.org
Date: 2006-09-19T20:39:42Z
Lists: pgsql-performance
Rod Taylor wrote:
> On Tue, 2006-09-19 at 15:22 +0200, Ivan Voras wrote:
>> I've just fired off a "DELETE FROM table" command (i.e. unfiltered 
>> DELETE) on a trivially small table but with many foreign key references 
>> (on similar-sized tables), and I'm waiting for it to finish. It's been 
>> 10 minutes now, which seems very excessive for a table of 9000 rows on a 
>> 3 GHz desktop machine.
> 
> I would guess that a few of those referenced tables are missing indexes
> on the referenced column.

Yes, it was a pilot error :(

Among the small and properly indexed referencing tables there was a
seldom queried but huge log table.