ITAGAKI Takahiro wrote:
> > > >Yes, that's correct. Per previous discussion, what I actually wanted to
> > > >do was to create a GUC setting to simplify the whole thing, something
> > > >like "autovacuum_max_mb_per_second" or "autovacuum_max_io_per_second".
> > > >Then, have each worker use up to (max_per_second/active workers) as much
> > > >IO resources.
> >
> > One thing I forgot to mention is that this is unlikely to be implemented
> > in 8.3.
>
> This is a WIP cost balancing patch built on autovacuum-multiworkers-5.patch.
> The total cost of workers are adjusted to autovacuum_vacuum_cost_delay.
I manually merged your patch on top of my own. This is the result.
Please have a look at whether the new code is correct and behaves sanely
(I haven't tested it).
--
Alvaro Herrera http://www.CommandPrompt.com/
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