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  • postgresql9.5查询sql或者进程是否存在锁

    方法一:
    select * from pg_locks a
    join pg_class b on a.relation = b.oid
    join pg_stat_activity c on a.pid = c.pid
    where a.mode like '%ExclusiveLock%';
    方法二:
    SELECT locker.pid,
           pc.relname,
           locker.mode,
           locker_act.application_name,
           least(query_start,xact_start) start_time,
           locker_act.state,
           CASE
               WHEN granted='f' THEN
                   'wait_lock'
               WHEN granted='t' THEN
                   'get_lock'
               END lock_satus,current_timestamp - least(query_start,xact_start) AS runtime,
           locker_act.query
    FROM pg_locks locker,pg_stat_activity locker_act, pg_class pc
    WHERE locker.pid=locker_act.pid
      AND NOT locker.pid=pg_backend_pid()
      AND application_name<>'pg_statsinfod'
      AND locker.relation = pc.oid
      AND pc.reltype<>0 --and pc.relname='t'
    ORDER BY  runtime desc;
    
    select pg_cancel_backend(pid) ;
    select pg_terminate_backend(pid);--杀死进程 ,pid为进程id
    
    select 
    pg_terminate_backend(pid) 
    from pg_stat_activity 
    where (now() - backend_start) > '00:10:00' and pid != (select pg_backend_pid()); --强杀连接超过10分钟的事务 不要杀死自己的进程
    
    
    select 
    pg_cancel_backend(pid) 
    from pg_stat_activity 
    where (now() - backend_start) > '00:10:00' and pid != (select pg_backend_pid()); --杀死连接超过10分钟的事务 不要杀死自己的进程
    
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  • 原文地址:https://www.cnblogs.com/caidingyu/p/12678226.html
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