Jay Knight <jay@xxxxxxxxxxxxx> writes: > I've tried this on a CentOS VM (VirtualBox on Windows) that I gave 2 cores, > and it worked as expected (it launched workers with and without explain > analyze), so I've only been able to reproduce this on Windows. FWIW, I tried your original example on Linux yesterday, and it seemed to work fine --- it only wanted to use 1 worker, but the speedup was just about exactly 2X with or without "explain analyze". So this is somehow Windows specific. That's darn odd; in a quick look at the relevant code I see nothing that looks platform dependent. Somebody will need to trace through this on Windows and see where it's going off the rails. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general