在oracle中，通过alter system kill session 'sid,serial#'查杀会话后，会话所持有的事务可能需要提交或回滚，此时该会话会被标记成killed，但是资源还没有释放，此时重复执行alter system kill session 'sid,serial#'时，会出现ORA-00031错误

此时只要将该会话的SPID找出来，从操作系统中杀掉该进程即可。

SELECT P.SPID, S.SID, S.SERIAL#, S.USERNAME, S.PROGRAM
FROM V$PROCESS P, V$SESSION S
WHERE P.ADDR=S.PADDR AND S.STATUS='KILLED';

SPID										SID    SERIAL# USERNAME   PROGRAM
------------------------------------------------------------------------ ---------- ---------- ---------- -------------------------
13755									       1632	 20355 ZJHIS	  emr_yzbjq.exe

SQL> !ps -ef | grep 13755
oracle   13755     1  0 15:34 ?        00:00:01 oracleorcl (LOCAL=NO)
oracle   20230 19615  0 17:13 pts/0    00:00:00 /bin/bash -c ps -ef | grep 13755
oracle   20232 20230  0 17:13 pts/0    00:00:00 grep 13755

SQL> !kill -9 13755

SQL> !ps -ef | grep 13755
oracle   20316 19615  0 17:14 pts/0    00:00:00 /bin/bash -c ps -ef | grep 13755
oracle   20318 20316  0 17:14 pts/0    00:00:00 grep 13755