dba诊断之lock

--产生锁的详细信息

select a.session_id, c.SERIAL#,d.spid, os_user_name, b.object_name,locked_mode,   

c.sql_id,c.PREV_SQL_ID,e.SQL_FULLTEXT,f.SQL_FULLTEXT,

g.START_TIME,c.blocking_session,

c.schemaname,c.machine,c.program,c.logon_time

from v$locked_object a

inner join dba_objects b on a.object_id = b.object_id

inner join v$session c on a.session_id = c.sid

inner join v$process d on c.paddr = d.addr

left join v$sql e on c.sql_id=e.SQL_ID

left join v$sql f on c.PREV_SQL_ID=f.sql_id 

left join v$transaction g on c.SADDR=g.ses_addr 

 

 --锁情况

 select * from v$lock where type = 'TX' or type = 'TM' order by sid, type;

 

--会话阻塞 

 select sid, blocking_session from v$session where blocking_session is not null;

 

  --会话阻塞等待 select in_wait,in_wait_secs,pid,sid,sess_serial#, blocker_pid,blocker_sid,blocker_sess_serial#

from v$wait_chains where blocker_is_valid= 'TRUE'

 

--查看会话占用IO

select * from v$sess_io

 

 -- kill session

 alter system kill session '3,1133' immediate;

 

orakill oracle_sid psid