> So the question is why on a relatively simple proc and I getting a query > performance delta between 3549ms and 7ms? What version of PG is it? I had such problems in a pseudo-realtime app I use here with Postgres, and they went away when I moved to 8.1 (from 7.4). I guess it is better shared buffer management code (don`t You see a big_query_searching_through_half_the_db just before You get this slow insert? ) . Greetings Marcin