Ch10. 운영 트러블슈팅

SELECT pid, usename, state, wait_event_type, wait_event, query
FROM pg_stat_activity
WHERE state <> 'idle';

SELECT blocked_locks.pid     AS blocked_pid,
       blocking_locks.pid    AS blocking_pid,
       blocked_activity.query AS blocked_query,
       blocking_activity.query AS blocking_query
FROM pg_locks blocked_locks
JOIN pg_stat_activity blocked_activity
  ON blocked_activity.pid = blocked_locks.pid
JOIN pg_locks blocking_locks
  ON blocking_locks.locktype = blocked_locks.locktype
 AND blocking_locks.DATABASE IS NOT DISTINCT FROM blocked_locks.DATABASE
 AND blocking_locks.relation IS NOT DISTINCT FROM blocked_locks.relation
 AND blocking_locks.page IS NOT DISTINCT FROM blocked_locks.page
 AND blocking_locks.tuple IS NOT DISTINCT FROM blocked_locks.tuple
 AND blocking_locks.virtualxid IS NOT DISTINCT FROM blocked_locks.virtualxid
 AND blocking_locks.transactionid IS NOT DISTINCT FROM blocked_locks.transactionid
 AND blocking_locks.classid IS NOT DISTINCT FROM blocked_locks.classid
 AND blocking_locks.objid IS NOT DISTINCT FROM blocked_locks.objid
 AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubid
 AND blocking_locks.pid != blocked_locks.pid
JOIN pg_stat_activity blocking_activity
  ON blocking_activity.pid = blocking_locks.pid
WHERE NOT blocked_locks.granted;