Markus Bertheau <twanger(at)bluetwanger(dot)de> writes:
> for a machine with 2 gig mem (1ghz pIII) is
> sort_mem =3D 128 # 64 Mebibyte
sort_mem is expressed in Kbytes, so you are not getting the results you
think. sort_mem = 65536 would equate to 64MB.
> shared_buffers =3D 65536 # 512 Mebibyte
> appropriate and reasonable?
I'd say both of those are on the high side. I'd go with half or a
quarter of those numbers as a starting point, ie sort_mem maybe about
16meg (16000), shared_buffers also maybe 16000. But since you didn't
say how many concurrent backends you expect to run, this is all just
theorizing in the dark.
regards, tom lane