Re: Vacuum wait time problem

Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> writes:
> On Fri, Feb 13, 2009 at 5:02 PM, Michael Monnerie
> <michael(dot)monnerie(at)is(dot)it-management(dot)at> wrote:
>> vacuum_cost_delay = 0
>> That was the trick for me. It was set to 250(ms), where it took 5 hours
>> for a vacuum to run. Now it takes 5-15 minutes.

> Wow!!! 250 ms is HUGE in the scheme of vacuum cost delay. even 10ms
> is usually plenty to slow down vacuum enough to keep it out of your
> way and double to quadruple your vacuum times.

I wonder whether we ought to tighten the allowed range of
vacuum_cost_delay. The upper limit is 1000ms at the moment;
but that's clearly much higher than is useful, and it seems
to encourage people to pick silly values ...

regards, tom lane