Ron St-Pierre wrote:
> Gregory Stark wrote:
>>> We were running autovacuum but it interfered with the updates to we
>>> shut it off.
>>
>> Was it just the I/O bandwidth? I'm surprised as your
>> vacuum_cost_delay is quite high. Manual vacuum doesn't do anything
>> differently from autovacuum, neither should interfere directly with
>> updates except by taking away I/O bandwidth.
>>
> I don't know what the problem was. I tried to exclude certain tables
> from autovacuuming, but it autovacuumed anyway.
Probably because of Xid wraparound issues. Now that you're vacuuming
weekly it shouldn't be a problem. (It's also much less of a problem in
8.2).
--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.