Tom Lane wrote:
> Heikki Linnakangas <heikki@enterprisedb.com> writes:
>> The number of buffers evicted by normal backends in a bgwriter_delay
>> period is simple to keep track of, just increase a counter in
>> StrategyGetBuffer and reset it when bgwriter wakes up. We can use that
>> as an estimate of X with some safety margin.
>
> You'd want some kind of moving-average smoothing in there, probably with
> a lot shorter ramp-up than ramp-down time constant, but this seems
> reasonable enough to try.
Ironically, I just noticed that we already have a patch in the patch
queue that implements exactly that, again by Itagaki. I need to start
paying more attention :-). Keep up the good work!
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com