Thanks so much, Tom.
That did the job. I increased it to every 15 minutes and it has dropped
substantially even though the pgstat.stat file is over 1 MB again.
It is unfortunate that the IO utilisation of this seems to be O(n^2) as
that is a big impediment to shared hosting. Is there any type of bounty
system where people can contribute to developing features?
Regards, David
On 29/07/12 00:13, Tom Lane wrote:
> David Barton <dave@oneit.com.au> writes:
>> I am running postgres 9.1.4 on Ubuntu 12.04 and the stats collector is
>> generating very high IO usage even when nothing appears to be happening
>> on the system.
>> I have roughly 150 different databases, each of which is running in 1 of
>> roughly 30 tablespaces. The databases are small (the dump of most is
>> are under 100M, and all but 3 are under 1G, nothing larger than 2G).
> That's a lot of databases. I think your problem probably stems from
> autovacuum madly trying to cover all of them. Backing off (increasing)
> autovacuum_naptime to slow its cycle might help.
>
> regards, tom lane
>