摘要：
1.PGSQL-查看sql正在运行的进程SELECTdatname,pid,state,queryFROMpg_stat_activitywherestate='active'SELECTprocpid,START,now()-STARTASlap,current_queryFROM(SELECTbackendid,pg_stat_get_backend_pid(S.backendid)ASpro
1.PGSQL-查看sql正在运行的进程
SELECT datname,pid,state,query FROM pg_stat_activity where state='active'
SELECTprocpid,
START,
now() - START ASlap,
current_query
FROM(
SELECTbackendid,
pg_stat_get_backend_pid (S.backendid) ASprocpid,
pg_stat_get_backend_activity_start (S.backendid) ASSTART,
pg_stat_get_backend_activity (S.backendid) AScurrent_query
FROM(
SELECTpg_stat_get_backend_idset () ASbackendid
) ASS
) ASS
WHEREcurrent_query <> '<IDLE>'
ORDER BYlap DESC;procpid：进程id
start：进程开始时间
lap：经过时间
current_query：执行中的sql
怎样停止正在执行的sql
SELECT pg_cancel_backend(进程id);
或者用系统函数
kill -9进程id;
2.查看表是否被锁，解锁表
select oid from pg_class where relname='m_ss_kjcx_tech_inovate_talent'
select pid from pg_locks where relation='4384913'
--如果查询到了结果，表示该表被锁 则需要释放锁定
select pg_cancel_backend(140650678843136)--PGSQL
select oid from pg_class where relname='m_ss_kjcx_tech_inovate_talent'
select pid from pg_locks where relation='4384913'
--如果查询到了结果，表示该表被锁 则需要释放锁定
select pg_cancel_backend(140650678843136)
--- 来查看有哪些SQL正在执行。 waiting='t'
select pid,backend_start,application_name,query_start,waiting,state ,query from pg_stat_activity
where query <>''
order by query_start asc
通过命令：
=# selectpg_cancel_backend(线程id);
来kill掉指定的SQL语句。（这个函数只能 kill Select 查询，而updae,deleteDML不生效）
使用可以kill 各种DML(SELECT,UPDATE,DELETE,DROP)操作=
=# select pg_terminate_backend(pid int)