Oracle CPU 占用

1.

top

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                                                  
 1467 oracle    20   0 2598m  86m  28m R  101  1.1   7134:54 oracle                                                                                                                                    
23442 oracle    20   0 2537m  27m  23m R  101  0.3   7151:10 oracle                                                                                                                                    
 7826 oracle    20   0 2540m  42m  35m R   99  0.5   8121:54 oracle  

##### 确认是远程链接

2.

ps -ef | grep 23442 

3.

 
vi traceTop.sql  ### add following lines

 SELECT   /*+ ORDERED */
         sql_text
    FROM v$sqltext a
   WHERE (a.hash_value, a.address) IN (
            SELECT DECODE (sql_hash_value,
                           0, prev_hash_value,
                           sql_hash_value
                          ),
                   DECODE (sql_hash_value, 0, prev_sql_addr, sql_address)
              FROM v$session b
             WHERE b.paddr = (SELECT addr
                                FROM v$process c
                               WHERE c.spid = '23442'))
ORDER BY piece ASC
/

4.

sqlplus 'as/ sysdba'

5.

sqlplus>@traceTop.sql

6. enter the pid on top cpu process


7. check the session

select s.username, s.osuser, s.sid, s.serial#, p.spid
from v$session s,v$process p
where s.paddr = p.addr
   and s.username is not null; 

8.

SQL> select sid,serial#,username from v$session where sid=142;

       SID    SERIAL# USERNAME
---------- ---------- ------------------------------
       142	54125 CLEARSPACE

SQL> alter system kill session '142,54125';

System altered.