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find session id from unix process id in oracle

Posted on 2008-06-20
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Last Modified: 2012-05-05
experts,

i ran one database script from os(unix) using nohup. i got unix process id. now i want to check the status of
my script in the database. how do i check it.

i want to find oracle session id based on this process id. how do i know this
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Question by:pavan27
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by:ajexpert
ID: 21835427
I believe there is no connection between unix process id and oracle process id.
However, based on user id you and instance name you can get the info by querying v$session view
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MarkJBobak earned 500 total points
ID: 22174729
Well, first, which unix process id do you have?  Of your client program (i.e. SQL*Plus, Pro*C program, etc) or of your server process (i.e. oracle{your_ORACLE_SID} )??

If you have the client program pid, do:
ps -ef|grep pid, and look for a program that has that pid as the parent id.

Here's an example:
Here, my pid of my SQL*Plus session is 7306, so I do:
ps -ef|grep 7306
and I see this:
oracle    7306 30614  0 16:01 pts/3    00:00:00 sqlplus
oracle    7307  7306  0 16:01 ?        00:00:00 oracleinprd1 (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
oracle    7440 31625  0 16:20 pts/3    00:00:00 grep 7306
oracle   31622  7306  0 16:15 pts/3    00:00:00 /bin/ksh -c sh


So, my server process is 7307.

Now, going to SQL*Plus, I can take that, and see the following:
  1* select vs.sid,vs.serial#,vs.username,vs.osuser,vs.machine,vs.program from v$session vs, v$process vp where vs.paddr = vp.addr and vp.spid = 7307
VMS@inprd1> /

       SID    SERIAL# USERNAME
---------- ---------- ------------------------------
OSUSER
------------------------------
MACHINE
----------------------------------------------------------------
PROGRAM
------------------------------------------------
       116      56847 VMS
oracle
rac01.prod.il.pqe
sqlplus@rac01.prod.il.pqe (TNS V1-V3)



So, v$process.spid is the background process, and it connects from v$process to v$session via v$process.addr=v$session.paddr.

Once you have the SID, you can look at V$SESSION, V$SESSION_WAIT, V$SESSTAT, etc, to monitor the session.

Hope that helps,

-Mark
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