ORACLE查询消耗较高的SQL

Posted 2021-03-01 cl-learning

　　  1.1 查看总消耗时间最多的前10条SQL语句

 

 

select *
  from (select v.sql_id,
               v.child_number,
               v.sql_text,
               v.elapsed_time,
               v.cpu_time,
               v.disk_reads,
               rank() over(order by v.elapsed_time desc) elapsed_rank
          from v$sql v) a
 where elapsed_rank <= 10;

 

　　 

　　  1.2 查看CPU消耗时间最多的前10条SQL语句

 

select *
  from (select v.sql_id,
               v.child_number,
               v.sql_text,
               v.elapsed_time,
               v.cpu_time,
               v.disk_reads,
               rank() over(order by v.cpu_time desc) elapsed_rank
          from v$sql v) a
 where elapsed_rank <= 10;

 

 

　　  1.3 查看消耗磁盘读取最多的前10条SQL语句

 

select *
  from (select v.sql_id,
               v.child_number,
               v.sql_text,
               v.elapsed_time,
               v.cpu_time,
               v.disk_reads,
               rank() over(order by v.disk_reads desc) elapsed_rank
          from v$sql v) a
 where elapsed_rank <= 10;