Semantics of deadlock aside, I seem to be deadlocked, yet postgres didn't detect any deadlock situation. There are no DDL queries running. Just a lot of updates, and some inserts and deletes. I had to restart postgres to let things recover - so I can't gather any more info right now - but if/when it happens again, I'd like to know what else to gather. Looking at the time stamps, the transaction start timestamp of this autovacuum query is the oldest one: autovacuum: VACUUM public.iphost 2008-04-24 03:05:13.212436-05 | Then, between 03:05:37 and 03:05:38, nearly every other connection came to a halt. A few connections came to a halt several hours later. I'm baffled, because this autovacuum query seems to have locked the entire database. I also don't know what the "waiting" column means in the output - but they all have the flag of "f". Does that column means that it is waiting on a lock - t or f? Thanks, Dan
