oracle 存储过程中执行 update 很慢

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如题，造成这个现象可能的原因 是表被锁了

执行下列sql语句

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;

alter system kill session 'sid,serial#';

下面的SQL直接查询出来放到PLSQL中执行即可

select 'alter system kill session '||'''||t.sid||','||t.serial#||'';'  from (
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
) t