ORACLE查询当前执行效率低的sql

--CPU高的SQL
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;
————————————————————————————————————————
重庆思庄OCP认证培训班火热报名中，每月循环开班，更多详情请访问思庄网站咨询在线客服！

来源：https://my.oschina.net/u/3635497/blog/3128848