The Hermit Hacker <scrappy(at)hub(dot)org> writes:
> The 4m:30s is running one process for 100K inserts ... with two
> CPUs/processes, it increases the time to process by almost 40% ... ?
Do you mean two processes inserting into the same table?
I committed some changes recently that reduce the amount of contention
involved in that scenario, but it's not released yet.
Another fairly likely issue is the not-very-good implementation of
spinlocks. We've talked about finding a way other than select() to
block on a spinlock, but no one's done anything about it yet...
regards, tom lane