死锁
查看是否有死锁
select sess.sid, sess.serial#, lo.oracle_username, lo.os_user_name, ao.object_name, lo.locked_mode from v$locked_object lo, dba_objects ao, v$session sess where ao.object_id = lo.object_id and lo.session_id = sess.sid;
杀死进程
alter system kill session 'sid,serial#'; --例如 alter system kill session '653,34420' immediate;
一下不好用
检查死锁的sql
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$locked_object));
检查死锁用户的sql
select b.username, b.serial#, d.id1, a.sql_text from v$lock d, v$session b, v$sqltext a where b.lockwait = d.kaddr and a.address = b.sql_address and a.hash_value = b.sql_hash_value;
确定谁锁了谁
select s1.username || '@' || s1.machine || ' ( SID=' || s1.sid || ' ) is blocking ' || s2.username || '@' || s2.machine || ' ( SID=' || s2.sid || ' ) ' AS blocking_status from v$lock l1, v$session s1, v$lock l2, v$session s2 where s1.sid = l1.sid and s2.sid = l2.sid and l1.BLOCK = 1 and l2.request > 0 and l1.id1 = l2.id1 and l2.id2 = l2.id2;
确定链接的sql
select sql_text from v$session v,v$sql s where SID=345 and v.sql_hash_value = s.hash_value;