Re: Reduced power consumption in autovacuum launcher process

Robert Haas <robertmhaas@gmail.com> writes:
> On Mon, Jul 18, 2011 at 10:35 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> A wakeup once every half hour would surely not be an issue from a power
>> consumption standpoint. �However, I'm not sure I understand here: aren't
>> we trying to remove the timeouts completely?

> Well, in the case of the AV launcher, the issue is that the main loop
> is timed by definition, cf. autovacuum_naptime, and the WaitLatch()
> interface is apparently designed so that we can't sleep longer than 35
> minutes.

Hmm.  Well, it's not too late to rethink the WaitLatch API, if we think
that that might be a significant limitation.  Offhand I don't see that
it is, though.
        regards, tom lane