1.pg锁监控脚本

  

  
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,

  
         blocked_activity.application_name AS blocked_application,

  
         blocking_activity.application_name AS blocking_application

  
   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;

  



  
 脚本显示结果：

  
    blocked_pid | blocked_user | blocking_pid | blocking_user |  blocked_statement   | current_statement_in_blocking_process | blocked_application | blocking_application 

  
-------------+--------------+--------------+---------------+----------------------+---------------------------------------+---------------------+----------------------

  
       63809 | tuser        |        90127 | tuser2        | update t1 set id3=1; | update t1 set id3=4;                  | psql                | psql

  
       71865 | pg13         |        63809 | tuser         | update t1 set id2=1; | update t1 set id3=1;                  | psql                | psql

  
(2 rows)