> I have seen it -- on 8.1 too. On our case it was caused by an insert > that was doing lots of toast insertions, so it needed to grab the > extension lock frequently for the toast table; and this was slowed > down by a largish shared_buffers setting, somehow (8.1 doesn't have lock > partitioning, so this was expensive). I don't recall details on why > these were related. If this is your case too, I doubt you'd be able to > reproduce it in 9.0 (not even in 8.2 which is when lock partitioning was > introduced).
Thanks, I'll bet that's the case. This is happening on machines with more RAM, so they've increased shared_buffers. Now, to get them off 8.1. Been trying for over a year now ... -- -- Josh Berkus PostgreSQL Experts Inc. http://www.pgexperts.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers