Thank you for the hints. > Why only those modes? I'd search for locks with granted=false, then see > all the other locks held by the process that's holding the conflicting > lock with granted=true (i.e. the one you're waiting on).
Something like this? SELECT granted, pid, virtualxid, transactionid, virtualtransaction, count(1) AS locks, current_query FROM pg_locks AS l LEFT JOIN pg_stat_activity AS a ON pid = procpid GROUP BY 1, 2, 3, 4, 5, 7 ORDER BY 1, 6 DESC; And two more queries to do extended analysis of its results after restarting PG: SELECT pg_stat_activity.datname, pg_class.relname, pg_locks.transactionid, pg_locks.mode, pg_locks.granted, pg_stat_activity.usename, pg_stat_activity.current_query, pg_stat_activity.query_start, age(now(),pg_stat_activity.query_start) AS "age", pg_stat_activity.procpid FROM pg_stat_activity, pg_locks LEFT OUTER JOIN pg_class ON pg_locks.relation = pg_class.oid WHERE pg_locks.pid = pg_stat_activity.procpid ORDER BY query_start; SELECT * FROM pg_locks; Are there another things I should do when the problem rise up again? -- Regards, Sergey Konoplev -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers