select sql_text from v$sql order by cpu_time desc
--逻辑读多的SQL:
select * from (select buffer_gets, sql_text from v$sqlarea where buffer_gets > 500000 order by buffer_gets desc) where rownum<=30;
--执行次数多的SQL :
select sql_text,executions from
(select sql_text,executions from v$sqlarea order by executions desc)
where rownum<81;
--读硬盘多的SQL :
select sql_text,disk_reads from (select sql_text,disk_reads from v$sqlarea order by disk_reads desc) where rownum<21;
--排序多的SQL :
select sql_text,sorts from (select sql_text,sorts from v$sqlarea order by sorts desc) where rownum<21;
--CPU消耗高,如果确认是oracle进程做的
--那么直接在OS上抓到消耗CPU的PID,然后查出是哪个session,找出相应的SQL
@getsqlbypid
select sql_text from v$sqltext where hash_value = ( select sql_hash_value from v$session where sid = ( select s.sid from v$session s, v$process p where p.addr = s.paddr and p.spid = &ospid )) order by piece;
转载:http://leonayx123.iteye.com/blog/1622897