Re: rapid degradation after postmaster restart

Joe Conway <mail(at)joeconway(dot)com> writes:
> ... Immediately
> after a postmaster restart, the first insert or two take about 1.5
> minutes (undoubtedly this could be improved, but it isn't the main
> issue). However by the second or third insert, the time increases to 7 -
> 9 minutes. Restarting the postmaster causes the cycle to repeat, i.e.
> the first one or two inserts are back to the 1.5 minute range.

Just to be clear on this: you have to restart the postmaster to bring
the time back down? Simply starting a fresh backend session doesn't do
it?

Are you using particularly large values for shared_buffers or any of the
other resource parameters?

regards, tom lane