--查看最耗磁盤讀寫率的磁盤語句
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$sql v) a
where elapsed_rank <= 10;
--查看產生表鎖的語句,可以的到SID號
select * from v$lock where type='TX';
--查看會話,根據SID和serial#字段可以斷開該會話
select * from v$session where sid=147;
select * from v$session where sid=138;
--查看產生死鎖的機器
select username,sid,serial#,lockwait,status,machine,program from v$session where sid in
(select session_id from v$locked_object)
--斷開會話
alter system kill session '138,45';
--查看產生死鎖的SQL語句
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))