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.
regards, tom lane
