Rafiq,
Thanks for the reply. This displays all the users who are accessing the
table, and not giving me the userId who is accessing my row. There are
plenty of users accessing the table in the production environment, it is
important for me to find the user who is accessing my row (row level).
I would like to explain the question in another way. I issued the following
stmt:
select * from xxxx where doc_nbr = '000012345' for update nowait;
It comes out with error ORA-54 saying that some other userid is updating the
same row. I would like to know the the userid who locked my row.
I need to get some info like 'address of the row' from my above stmt. and
get the userid who locked the same row. If I can get the row_wait_row# value
of the above stmt, then, I can use it in the join stmt on row_wait_row#
column of the v$session to get the SID,SERIAL#,USERNAME etc.
I don't know how to get the row_wait_row# value for my above stmt. In
V$session it is displaying numbers such as 8, 12, 16etc. If this gives you
any clue, please try to help me.
Thanks ... Babu
-----Original Message-----
Sent: Friday, February 02, 2001 12:32 PM
To: Multiple recipients of list ORACLE-L
Babu,
The message "Resource busy' is coming when your code is trying to change
definition of table or trying to create any index when table is in use not
for dml but may be somebody running select only.You may use following script
to check which user is accessing this table in case if any dml is
invloved.....
set linesize 120
select substr(a.os_user_name,1,8) "OS User"
, substr(b.object_name,1,30) "Object Name"
, substr(b.object_type,1,8) "Type"
, substr(c.segment_name,1,10) "RBS"
, e.process "PROCESS"
, substr(d.used_urec,1,8) "# of Records"
from v$locked_object a
, dba_objects b
, dba_rollback_segs c
, v$transaction d
, v$session e
where a.object_id = b.object_id
and a.xidusn = c.segment_id
and a.xidusn = d.xidusn
and a.xidslot = d.xidslot
and d.addr = e.taddr
/
Regards
Rafiq
To: 'Mohammad Rafiq' <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
Date: Fri, 2 Feb 2001 12:17:31 -0800
Rafiq,
You are right. After running the catblock.sql script, I could see the views,
but the output is "no rows selected". This is because the session that is
accessing the locked row comes out with ORA-54 error instead of waiting for
the lock to be released. There is a "nowait" clause at the end of the stmt.
They don't want to session to wait if the row is locked by some other
session, they just want to return ORA-54 error, but at the same time they
want to know what user is locked the row at the time our session is
accessing the row. If you have any other ideas, please let me know.
Thanks ... Babu
-----Original Message-----
Sent: Friday, February 02, 2001 11:58 AM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Babu,
Your system may be missing dba_blockers,dba_waiters views. Please look
for script catblock.sql under $ORACLE_HOME/rdbms/admin and run it as per
guidance given in that script.
Regards
Rafiq
To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]>
CC: 'Mohammad Rafiq' <[EMAIL PROTECTED]>
Date: Fri, 2 Feb 2001 10:59:20 -0800
Rafiq,
I tried to execute the query, It comes out with an error: dba_blockers does
not exist. I verified in all of my Oracle 8i databases and have not found
that view anywhere. Has it been removed in 8i? If not, I don't have any clue
why it is not showing up?
Thanks...Babu
-----Original Message-----
Sent: Friday, February 02, 2001 9:56 AM
To: Multiple recipients of list ORACLE-L
Babu,
The message you have given pointing that object itself is being used and
some application trying to create index on that table or table definition
itself being changed.
Try following query which might help:
spool holding_session.lst
column object_name justify c heading "Object|Name" format a32
column username justify c heading "User|Name" format a7
column osuser justify c heading "OS|User" format a7
column pid justify c heading "Ora|Proc|ID" format 999
column serial# justify c heading "Ora|Serial|#" format 999999
column sid justify c heading "Holding|Session" format 999
column spid justify c heading "Unix|Proc" format a5
column object_id justify c heading "Obj|ID" format 99999
column lockwait justify c heading "Lock|Wait"
column type justify c heading "Lock|Type" format a4
column lmode justify c heading "Mode" format 9999
set pagesize 60 linesize 100
select lck.sid, ses.serial#, pro.pid, pro.spid, obj.object_name,
obj.object_id, ses.username, ses.osuser,
lck.type, lck.lmode
from dba_blockers blk, dba_objects obj, v$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: [EMAIL PROTECTED]
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
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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