novanbramantya / locking-monitoring-postgresql

Query untuk check Locking and Blocking

LOCKING MONITORING

SELECT blocked_locks.pid     AS blocked_pid,
       blocked_activity.usename  AS blocked_user,
       blocking_locks.pid     AS blocking_pid,
       blocking_activity.usename AS blocking_user,
       blocked_activity.query    AS blocked_statement,
       blocking_activity.query   AS current_statement_in_blocking_process
 FROM  pg_catalog.pg_locks         blocked_locks
  JOIN pg_catalog.pg_stat_activity blocked_activity  ON blocked_activity.pid = blocked_locks.pid
  JOIN pg_catalog.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_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pid
 WHERE NOT blocked_locks.GRANTED;

kalau memang ada query yang locking maka hasilnnya akan tampak seperti dibawah ini:

 blocked_pid | blocked_user | blocking_pid | blocking_user |             blocked_statement              | current_statement_in_blocking_process 
-------------+--------------+--------------+---------------+--------------------------------------------+---------------------------------------
       15798 | postgres     |        26544 | tokopedia     | drop index concurrently ws_shop_date_idx1; | select                               +
             |              |              |               |                                            | shop_id                              +
             |              |              |               |                                            | from ws_shop                         +
             |              |              |               |                                            | where lower(domain) = $1
(1 row)

Note: Yang di terminate adalah blocking_pid sebelum melakukan terminate, cek dulu sudah berjalan berapa lama query yang blocking itu