update超时可能是由于表或记录被锁住导致的 执行下面sql查看被锁住的记录
SELECT s.sid, s.serial# FROM v$locked_object lo, dba_objects ao, v$session s WHERE ao.object_id = lo.object_id AND lo.session_id = s.sid;
然后删除锁定记录
ALTER system KILL session '131,848';