Oracle-L: Re: Things to validate / collect before Killing a session !!!!

From: AK <oramagic_at_hotmail.com>
Date: Tue, 08 Apr 2003 14:34:22 -0800
Message-ID: <F001.0057D70F.20030408143422@fatcity.com>

RE: Things to validate / collect before Killing a session !!!!This is where smon will come into picture and clear any locks or rollback data . Just a guess .

-ak

Original Message ----- From: Reddy, Madhusudana To: Multiple recipients of list ORACLE-L Sent: Tuesday, April 08, 2003 2:43 PM Subject: RE: Things to validate / collect before Killing a session !!!!

My Question is very simple , sorry to be ambiguous with my poor English...

We can kill a session either by " Alter System Kill Session ... " or by identifying the PID and use KILL command on OS Side .

Sometimes to rollback the huge transaction , Oracle keeps the session in " KILLED" status , but it wont really clear the session , unlike KILL from OS ( correct me if I am wrong ) . My question is HOW Oracle is going to rollback the transaction when we use the KILL -9 <PID> as the session immediately disappears when we query V$SESSION for SID.

And also are there any parameters in init.ora that are going to effect the Rollback ( Any Parallel Rollback ??? ).

[Madhu, Reddy]

-----Original Message-----
From: Arun Annamalai [mailto:oracle_at_shakaboom.com] Sent: Tuesday, April 08, 2003 3:34 PM To: Multiple recipients of list ORACLE-L Subject: Re: Things to validate / collect before Killing a session !!!!

Madhu.

You seem to be confused between "kill -9" and "Alter system" and adding to the confusion.."rollback" and "PARALLEL"

I suggest read the Concepts manual, epc on how client and server process work for an oracle session.

-Arun.
Sr. Oracle DBA

Original Message ----- From: Reddy, Madhusudana To: Multiple recipients of list ORACLE-L Sent: Friday, April 04, 2003 2:53 PM Subject: RE: Things to validate / collect before Killing a session !!!!

Thanks Kurt !!!

All,

        what Actually Oracle will do when we kill the JOB by " kill -9" , instead of "Alter System ....".  What about the Rollback  ??
        Any PARALLEL parameters in init.ora has any effect if we kill the process by "kill -9".
        Any other inputs on " Collecting the stats before killing a session " ??

        [Madhu, Reddy] 

         -----Original Message-----
        From: Wiegand, Kurt [mailto:Kurt.Wiegand_at_CWUSA.COM]
        Sent: Friday, April 04, 2003 11:24 AM
        To: Multiple recipients of list ORACLE-L
        Subject: RE: Things to validate / collect before Killing a session !!!!


        I always check to see how much rollback they have in case I want to watch 
        it rollback and I always make sure I get the pid for the associated UNIX 
        process in case I decide I need to kill it.  Of course, I always almost 
        remember to do these two things. 

        Kurt 

        -----Original Message----- 
        From: Reddy, Madhusudana [mailto:Madhusudana.Reddy_at_bestbuy.com] 
        Sent: Friday, April 04, 2003 11:34 AM 
        To: Multiple recipients of list ORACLE-L 
        Subject: Things to validate / collect before Killing a session !!!! 



        Hi List, 
        We all need to kill the user sessions in the situations of locking or sometime on end user / application support person's request . I would like to know best practices followed before killing a session , Any of you collect some information/statistics before kill ?? 

        Please share your ideas and advice me  on this. 

        Thanks in advance,Madhu 



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        Please see the official ORACLE-L FAQ: http://www.orafaq.net 
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        Author: Reddy, Madhusudana 
          INET: Madhusudana.Reddy_at_bestbuy.com 

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Author: AK
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