Michael Paquier <michael.paquier@gmail.com> writes: > Doing a join on pg_stat_activity and pg_locks is not going to help > much as you could only get the moment when query has started or its > state has changed. Have you thought about the addition of a new column > in pg_locks containing the timestamp of the moment a lock has been > taken? I am sure that we are concerned about the performance impact > that extra calls to gettimeofday could have though...
In theory this could be driven off the same gettimeofday needed to start the deadlock_timeout timer. Not sure how messy that'd be.
