On Mon, Feb 22, 2010 at 12:30 PM, Yang Zhang <yanghatespam@gmail.com> wrote:
> This isn't some microbenchmark. This is part of our actual analytical
> application. We're running large-scale graph partitioning algorithms.
It's important to see how it runs if you can fit more / most of the
data set into memory by cranking up work_mem to something really big
(like a gigabyte or two) and if the query planner can switch to some
sort of hash algorithm.
Also, can you cluster the table on transactionid ?