Cancel the debate and information about the object

Hi experts,

A single transaction is a rollback segment. A transaction cannot expand into multiple undo segments. While a rollback segment can accommodate more than one operation because there are limited (10-20) undo segments, while there are hundreds / millions of transactions occurs at the same time. It is my understanding and please correct if I am wrong.
Now my question is how can I find out what a particular (TABLE) schema.object under these Undo segments (because the users have not completed their transaction i.e. commit / rollback). The transaction because $ v will tell me N No of operations are pending, but I want to know that how many operations is waiting on a schema.object/table. Is there any display/DBMS/sql, telling me that, at this time, scott.emp is by accessing these users / sid #.

Is there that one way i.e. "journal - miner? If Yes, then please give me an example no metalink/year.

concerning
Nisha sharma

Sorry, I forgot to attach v$ locked_object with transaction$ v:

select v.sid, v.username, t.xidusn, t.ses_addr, r.segment_id, r.segment_name as UNDO_SEGMENT_NAME, DBO.OBJECT_NAME
from v$session v, v$transaction
 t, dba_rollback_segs r, v$locked_object lo, dba_objects dbo
where v.saddr = t.ses_addr
and t.xidusn = r.segment_id
and LO.OBJECT_ID = DBO.OBJECT_ID
and LO.XIDUSN = T.XIDUSN
order by 6

Published by: drop.any on November 18, 2009 22:47

Tags: Database

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