Sid from Unix Process ID

Posted By Sagar Patil

Here is a situation, This afternoon I have seen my CPU hitting through the roof on a Live system. There are about 6 Oracle instances and one is chewing more than 90% of CPU time.

– I want to know which Instance /process is a culprit 

  PID USERNAME PRI NICE  SIZE   RES STATE   TIME    CPU COMMAND
638523 oracle    52    0 1360M  503M run   574:22 99.10% oracle
958998 oracle    42    0 1363M  506M run   518:12 46.20% oracle
982071 oracle    42    0 1360M  502M WAIT  618:58 38.40% oracle

 

select s.username, s.status,  s.sid,     s.serial#,
       p.spid,     s.machine, s.process, s.lockwait
from   v$session s, v$process p
where  p.spid     = &oracle_pid
and    s.paddr    = p.addr;

Replace ‘&unix_pid’  with 958998 

USERNAME    STATUS    SID    SERIAL#    SPID    MACHINE    PROCESS    LOCKWAIT
SYS         ACTIVE    241    38945      958998

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