> random_page_cost = 0.5 Not likely. The lowest this value should ever be is 1, and thats if you're using something like a ram drive.
If you're drives are doing a ton of extra random IO due to the above (rather than sequential reads) it would lower the throughput quite a bit. Try a value of 2 for a while. ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster