一：
SQL> SELECT pid,spid FROM V$PROCESS WHERE ADDR IN (SELECT PADDR FROM V$SESSION where username ='SYS');
PID SPID
---------- ------------
17 13657
ps -ef |grep 13657
kill -9 13657
二：
SQL> SELECT sid,serial# FROM V$SESSION WHERE sid in (SELECT distinct sid FROM V$MYSTAT);
SID SERIAL#
---------- ----------
1637 13894
alter system disconnect session '1637,13894' immediate;