文档课题：根据session sid查系统层面对应的进程pid以及top单独查某进程数据.
1、查系统层面pid
SQL> select sid,serial# from v$session where sid=28; 

       SID    SERIAL#
---------- ----------
        28      62762

SQL> select pro.spid from v$session ses,v$process pro where ses.sid='28' and ses.paddr=pro.addr;

SPID
------------------------
16483
[oracle@dbserver ~]$ ps -ef|grep 16483
oracle     16483       1  0 18:48 ?        00:00:00 oracleorclcdb (LOCAL=NO)
oracle     16819    6036  0 19:45 pts/2    00:00:00 grep --color=auto 16483
[oracle@dbserver ~]$ kill -9 16483
SQL> select sysdate from dual;
select sysdate from dual
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 16483
Session ID: 28 Serial number: 62762
2、查指定进程
[oracle@dbserver ~]$ top -p 16836
Tasks:   1 total,   0 running,   1 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.1 us,  0.2 sy,  0.0 ni, 99.1 id,  0.1 wa,  0.5 hi,  0.1 si,  0.0 st
MiB Mem :   7672.2 total,    251.2 free,   2721.1 used,   4699.9 buff/cache
MiB Swap:   8092.0 total,   8006.7 free,     85.2 used.    848.0 avail Mem 

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND                                                                                                                                                          
  16836 oracle    20   0 2842952  78872  74836 S   0.0   1.0   0:00.02 oracle_16836_or