PG锁监控

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;