set serveroutput on size unlimited
set feedback off 
DECLARE
   v_num_sessions INTEGER := 0;
   CURSOR cv IS
SELECT dba_objects.object_name,
       locks_t.row#,
       locks_t.blocked_secs,
       locks_t.blocker_text,
       locks_t.blocked_text,
       locks_t.blocked_sql_text
  FROM (SELECT /*+ NO_MERGE */
               blocking_lock_session.username||'@'||blocking_lock_session.machine||'(SID='||blocking_lock_session.sid||') ['||
               blocking_lock_session.program||'/PID='||blocking_lock_session.process||']' as blocker_text,
               blocked_lock_session.username||'@'||blocked_lock_session.machine|| '(SID='||blocked_lock_session.sid||') ['||
               blocked_lock_session.program||'/PID='||blocked_lock_session.process||']' as blocked_text,
               blocked_lock_session.row_wait_obj#,
               blocked_lock_session.row_wait_file#,
               blocked_lock_session.row_wait_block#,
               blocked_lock_session.row_wait_row#,
               DBMS_ROWID.ROWID_CREATE (1,
                  blocked_lock_session.row_wait_obj#,
                  blocked_lock_session.row_wait_file#,
                  blocked_lock_session.row_wait_block#,
                  blocked_lock_session.row_wait_row#) row#,
               blocked_lock_session.seconds_in_wait blocked_secs,
               blocked_sql.sql_text blocked_sql_text
          FROM v$lock blocking_lock,
               v$session blocking_lock_session,
               v$lock blocked_lock,
               v$session blocked_lock_session,
               v$sql blocked_sql
         WHERE blocking_lock.block = 1
           AND blocking_lock.id1 = blocked_lock.id1
           AND blocking_lock.id2 = blocked_lock.id2
           AND blocked_lock.request > 0
           AND blocking_lock.sid = blocking_lock_session.sid
       AND blocked_lock.sid = blocked_lock_session.sid
           AND blocked_lock_session.sql_id = blocked_sql.sql_id
           AND blocked_lock_session.sql_child_number = blocked_sql.child_number
       ) locks_t,
       dba_objects
 WHERE locks_t.row_wait_obj# = dba_objects.object_id
   AND locks_t.blocked_secs > &1
ORDER BY locks_t.blocked_secs;
 
BEGIN
   FOR cv_rec IN cv LOOP
      dbms_output.put_line(
         '========= $Revision: 1.4 $ ($Date: 2013/09/16 13:15:22 $) ===========');
      v_num_sessions := v_num_sessions + 1;
      dbms_output.put_line('Locked object : '||
         cv_rec.object_name);
      dbms_output.put_line('Locked row#   : '||
         cv_rec.row#);
      dbms_output.put_line('Blocked for   : '||
         cv_rec.blocked_secs||' seconds');
      dbms_output.put_line('Blocker info. : '||
         cv_rec.blocker_text);
      dbms_output.put_line('Blocked info. : '||
         cv_rec.blocked_text);
      dbms_output.put_line('Blocked SQL   : '||
         cv_rec.blocked_sql_text);
   END LOOP;
   dbms_output.new_line;
   dbms_output.put_line('Found '||TO_CHAR(v_num_sessions)||
      ' blocked session(s).');
END;
/
exit;

上面这个语句用来查当前被阻塞的对象详细信息，特别好使 

 根据上面的结果 知道了阻塞对象、阻塞数据的rowid，阻塞者和被阻塞者的SID

根据阻塞者的SID 找到对应对应和serial#

select b.sid,b.serial#,b.username,a.sql_text
from v$sqlarea a,v$session b where a.SQL_ID=b.PREV_SQL_ID and b.SID=14;
然后kill掉这个进程，阻塞被释放
alter system kill session '14,16293'