How to quickly kill database processes that take up too many resources (CPU, memory)_PHP Tutorial

Many times due to exceptions or program errors, individual processes occupy a large amount of system resources, and these processes need to be terminated. You can usually use the following command to kill the process:
alter system kill session 'sid,serial#';

But This command releases resources very slowly. For details, please refer to: Research on Kill session in Oracle.
In order to release resources more quickly, we usually use the following steps to kill the process:
1. First kill the process at the operating system level
2. Kill session inside the database
This can usually quickly terminate the process and release resources.
I encountered such a case today. Other friends killed the session in the database, but it still had no effect for a long time:
[oracle@danaly ~]$ sqlplus "/ as sysdba"
SQL*Plus: Release 10.2.0.1.0 - Production on Thu Oct 27 11:09:50 2005
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2 .0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options
SQL> select sid,username,status from v$session;
SID USERNAME STATUS
- ---------- ------------------------------ --------
....
154 SCOTT KILLED
...
30 rows selected.

Then follow the steps I mentioned earlier, first query the OS process number corresponding to the session:
SQL> select 'kill -9 '||spid from v$process where addr = (select paddr from v$session where sid=&sid);
Enter value for sid: 154
old 1: select ' kill -9 '||spid from v$process where addr = (select paddr from v$session where sid=&sid)
new 1: select 'kill -9 '||spid from v$process where addr = (select paddr from v$session where sid=154)
'KILL-9'||SPID
--------------------
kill -9 22702
SQL> !

Kill the process at the operating system level:
[oracle@danaly ~]$ ps -ef|grep 22702
oracle 22702 1 0 Oct25 ? 00:00: 02 oracledanaly (LOCAL=NO)
oracle 12082 12063 0 11:12 pts/1 00:00:00 grep 22702
[oracle@danaly ~]$ kill -9 22702
[oracle@danaly ~] $ ps -ef|grep 22702
oracle 12088 12063 0 11:12 pts/1 00:00:00 grep 22702
[oracle@danaly ~]$ exit