Oracle CPU使用情况查询代码,PLSQL代码库,德仔网

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【PLSQL】 Oracle CPU使用情况查询

作者:itcoder / 发布于2016/9/13/ 1265

--发现那些SQL运行了大量的PARSE  
select sql_text, parse_calls, executions  
  from v$sqlarea  
 order by parse_calls desc;  
  
--SYS的总的PARSE情况  
select name, value from v$sysstat where name like 'parse count%';  
  
--CPU空间及繁忙情况  
select * from v$osstat;  
  
--查看每个Session的CPU利用情况：  
select ss.sid, se.command, ss.value CPU, se.username, se.program  
  from v$sesstat ss, v$session se  
 where ss.statistic# in  
       (select statistic#  
          from v$statname  
         where name = 'CPU used by this session')  
   and se.sid = ss.sid  
   and ss.sid > 6  
 order by CPU desc;  
  
--比较一下哪个session的CPU使用时间最多，然后查看该Session的具体情况：  
select s.sid, s.event, s.MACHINE, s.OSUSER, s.wait_time, w.seq#, q.sql_text  
  from v$session_wait w, v$session s, v$process p, v$sqlarea q  
 where s.paddr = p.addr  
   and s.sid = &p  
   and s.sql_address = q.address;  
  
--占用CPU最高的10个Session及其SQL语句  
select s.sid,  
       w.wait_time,  
       w.seconds_in_wait,  
       w.state,  
       w.wait_time_micro,  
       w.time_remaining_micro,  
       w.time_since_last_wait_micro,  
       p.USERNAME,  
       status,  
       server,  
       schemaname,  
       osuser,  
       machine,  
       p.terminal,  
       p.program,  
       logon_time,  
       w.event,  
       w.wait_class,  
       tracefile,  
       sql_text,  
       last_active_time  
  from v$session_wait w, v$session s, v$process p, v$sqlarea q  
 where s.paddr = p.addr  
   and s.sid in (select sid  
                   from (select ss.sid  
                           from v$sesstat ss, v$session se  
                          where ss.statistic# in  
                                (select statistic#  
                                   from v$statname  
                                  where name = 'CPU used by this session')  
                            and se.sid = ss.sid  
                            and ss.sid > 6  
                          order by ss.value desc)  
                  where rownum < 11)  
   and s.sql_address = q.address;

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