--查看锁
select sys.v_$session.osuser,sys.v_$session.machine,v$lock.sid,
sys.v_$session.serial#,
decode(v$lock.type,
'MR', 'Media Recovery',
'RT','Redo Thread',
'UN','User Name',
'TX', 'Transaction',
'TM', 'DML',
'UL', 'PL/SQL User Lock',
'DX', 'Distributed Xaction',
'CF', 'Control File',
'IS', 'Instance State',
'FS', 'File Set',
'IR', 'Instance Recovery',
'ST', 'Disk Space Transaction',
'TS', 'Temp Segment',
'IV', 'Library Cache Invalida-tion',
'LS', 'Log Start or Switch',
'RW', 'Row Wait',
'SQ', 'Sequence Number',
'TE', 'Extend Table',
'TT', 'Temp Table',
'Unknown') LockType,
rtrim(object_type) || ' ' || rtrim(owner) || '.' || object_name object_name,
decode(lmode, 0, 'None',
1, 'Null',
2, 'Row-S',
3, 'Row-X',
4, 'Share',
5, 'S/Row-X',
6, 'Exclusive', 'Unknown') LockMode,
decode(request, 0, 'None',
1, 'Null',
2, 'Row-S',
3, 'Row-X',
4, 'Share',
5, 'S/Row-X',
6, 'Exclusive', 'Unknown') RequestMode,
ctime, block b
from v$lock, all_objects, sys.v_$session
where v$Lock.sid > 6
and sys.v_$session.sid = v$lock.sid
and v$lock.id1 = all_objects.object_id;
--查看死锁
SELECT
SUBSTR(s1.username,1,12) "WAITING USER"
, SUBSTR(s1.osuser,1,8) "OS User"
, SUBSTR(TO_CHAR(w.session_id),1,5) "Sid"
, p1.spid "PID"
, SUBSTR(s2.username,1,12) "HOLDING User"
, SUBSTR(s2.osuser,1,8) "OS User"
, SUBSTR(TO_CHAR(h.session_id),1,5) "Sid"
, p2.spid "PID"
FROM
sys.v_$process p1
, sys.v_$process p2
, sys.v_$session s1
, sys.v_$session s2
, dba_locks w
, dba_locks h
WHERE
h.mode_held != 'None'
AND h.mode_held != 'Null'
AND w.mode_requested != 'None'
AND w.lock_type (+) = h.lock_type
AND w.lock_id1 (+) = h.lock_id1
AND w.lock_id2 (+) = h.lock_id2
AND w.session_id = s1.sid (+)
AND h.session_id = s2.sid (+)
AND s1.paddr = p1.addr (+)
AND s2.paddr = p2.addr (+)
捕捉运行很久的sql
column username format a12
column opname format a16
column progress format a8
select username,sid,opname,
round(sofar*100 / totalwork,0) || '%' as progress,
time_remaining,sql_text
from v$session_longops , v$sql
where time_remaining <> 0
and sql_address = address
and sql_hash_value = hash_value
查看还没提交的事务
select * from v$locked_object;
select * from v$transaction;
查找object为哪些进程所用
select p.spid,s.sid,s.serial# serial_num,s.username user_name, a.type object_type,s.osuser os_user_name, a.owner, a.object object_name, decode(sign(48 - command), 1, to_char(command), 'action code #' || to_char(command) ) action, p.program oracle_process, s.terminal terminal, s.program program, s.status session_status
from v$session s, v$access a, v$process p
where s.paddr = p.addr and
s.type = 'user' and
a.sid = s.sid and
a.object='subscriber_attr'
order by s.username, s.osuser
(笔者原创文章，转载请注明出处：https://blog.csdn.net/LFCuiYs）谢谢！