"Peter Bauer" <peter.m.bauer@xxxxxxxxx> writes: > we have a theory for the root of all evil which causes a reproducable > deadlock which is not detected by Postgre: > The DELETE statement contains a select which waits for a sharelock > (according to pg_locks and pg_stat_activity) on rows locked by the > UPDATE statement. The UPDATE itself waits to get a lock for some rows > which are exclusively locked by the DELETE statement (got from its > sub-SELECT). > What do you think about this theory? Not much. It's been years since anyone found a bug in the deadlock detector; if you want us to believe you have an undetected deadlock, you'll need more evidence than an unsupported assertion. regards, tom lane