Simon Riggs wrote: > The way this would work is if Startup waits on a buffer pin we > immediately send out a request to all backends to cancel themselves if > they are holding the buffer pin required && waiting on a lock. We then > sleep until max_standby_delay. When max_standby_delay = -1 we only sleep > until deadlock timeout and then check (on the Startup process).
Should wake up to check for deadlocks after deadlock_timeout also when max_standby_delay > deadlock_timeout. max_standby_delay could be hours - we want to detect a deadlock sooner than that. Generally speaking, max_standby_delay==-1 codepath shouldn't be any different from the max_standby_delay>0 codepath. -- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
