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RE: How to find USER who locked my row ...

From: Mohammad Rafiq <rafiq9857_at_hotmail.com>
Date: Fri, 02 Feb 2001 10:08:00 -0800
Message-ID: <F001.002A93B6.20010202095621@fatcity.com>

Babu,

The message you have given pointing that object itself is being used and some application trying to create index on that table or table definition itself being changed.
Try following query which might help:

spool holding_session.lst

column object_name justify c heading "Object|Name"  format a32
column username    justify c heading "User|Name"    format a7
column osuser      justify c heading "OS|User"      format a7
column pid         justify c heading "Ora|Proc|ID"  format 999
column serial#     justify c heading "Ora|Serial|#" format 999999
column sid         justify c heading "Holding|Session"  format 999
column spid        justify c heading "Unix|Proc"    format a5
column object_id   justify c heading "Obj|ID"       format 99999
column lockwait    justify c heading "Lock|Wait"
column type        justify c heading "Lock|Type"    format a4
column lmode       justify c heading "Mode"         format 9999
set pagesize 60 linesize 100
select lck.sid, ses.serial#, pro.pid, pro.spid, obj.object_name,
       obj.object_id, ses.username, ses.osuser,
       lck.type, lck.lmode
from dba_blockers blk, dba_objects obj, v$lock lck,
     v$session ses, v$process pro
where blk.holding_session = ses.sid
and   lck.id1   = obj.object_id
and   lck.sid   = ses.sid

and ses.paddr = pro.addr
and ses.username is not NULL
order by obj.object_name, ses.lockwait desc, lck.sid; spool off
clear columns
/
Regards
Rafiq

Reply-To: ORACLE-L_at_fatcity.com
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Date: Fri, 02 Feb 2001 09:16:19 -0800

Steve,

Unfortunately, I can't take out NOWAIT as it is part of the application design. They don't want the query to hang for some other user to unlock the record. There are plenty of users accessing the same table and the same row at the same time. We want the query to return with ORA-54, but at the same time we would like to know the the user/user details who locked the record of the table. This is part of the requirement of this application here.

Is there a way to find the details that we need? Please let me know if there is any solution.

Thanks ... Babu

-----Original Message-----

Sent: Thursday, February 01, 2001 6:51 PM To: Multiple recipients of list ORACLE-L

Hi Babu,

Take out the NOWAIT temporarily so that the session will wait, and then look in
V$LOCK to see which TX lock you are waiting for and who is holding it.

@   Regards,
@   Steve Adams
@   http://www.ixora.com.au/
@   http://www.christianity.net.au/


-----Original Message-----

Sent: Friday, 2 February 2001 9:50
To: Multiple recipients of list ORACLE-L

Dear list,

I am simulating an error generated by an application.

select * from XXX where fdoc_nbr = '12345' for update nowait;

It returns with error:
ORA-00054 Resource busy acquire with nowait specified.

I need to findout who(SID,SERIAL#,USERNAME) locked the same ROW (not table). There are many users who are locking different rows of the same table at the same time. I need to find the one who locked my row.

I would appreciate if someone could help me with this.

TIA,
-- Babu

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Author: Steve Adams

   INET: steve.adams_at_ixora.com.au

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Author: Mohammad Rafiq
  INET: rafiq9857_at_hotmail.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists

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To REMOVE yourself from this mailing list, send an E-Mail message
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Original text of this message

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