--查看最耗磁盘读写率的磁盘语句

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;

--查看产生表锁的语句，可以的到SID号

select * from v$lock where type='TX';

--查看会话，根据SID和serial#字段可以断开该会话

select * from v$session where sid=147;

select * from v$session where sid=138;

--查看产生死锁的机器

select username,sid,serial#,lockwait,status,machine,program from v$session where sid in 

(select session_id from v$locked_object)

--断开该会话

alter system kill session '138,45';

--查看产生死锁的SQL语句

select sql_text from v$sql where hash_value in 

(select sql_hash_value from v$session where sid in 

(select session_id from v$locked_object))