RE: V$session_wait question and rollback segments

From: Powell, Mark D <mark.powell_at_eds.com>
Date: Mon, 10 May 2004 12:12:58 -0400
Message-ID: <564DE4477544D411AD2C00508BDF0B6A1CE0AB29@usahm018.exmi01.exch.eds.com>

I do not think an actual full working SQL was posted. I generally use the v$transaction table to get this information if I want it but here is an SQL script that appears to work and which can be found in the comp.databases.oracle.server archives: enqueue wait events, locks and the meaning of id1/id2 by Brian Peasland 2004-01-27.

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&newwindow=1&safe =off&threadm=T9NRb.71%24rj4.789%40news2.e.nsc.no&rnum=1&prev=/groups%3Fas_q% 3Did1%2520rbs%2520segment%26safe%3Doff%26ie%3DUTF-8%26oe%3DUTF-8%26as_ugroup %3Dcomp.databases.oracle*%26as_drrb%3Db%26as_mind%3D1%26as_minm%3D1%26as_min y%3D2000%26as_maxd%3D10%26as_maxm%3D5%26as_maxy%3D2004%26lr%3D%26num%3D30%26 hl%3Den

SELECT TRUNC(id1/POWER(2,16)) rbs,

BITAND(id1,TO_NUMBER('ffff','xxxx'))+0 slot, id2 seq FROM v$lock
WHERE sid=8 AND type='TX';

HTH -- Mark D Powell --

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

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Diego Cutrone Sent: Monday, May 03, 2004 11:26 PM
To: Oracle List
Subject: V$session_wait question and rollback segments

Hi List,
Does anybody know how to derivate the rollback number and the slot number within the rollback transaction table from v$session_wait id1 and id2 on an enqueue TX wait?

      SID                   ID1                         ID2
      112     enqueue  0000000054580006 0000000000030035

I know there's a formula for this, but I just can't find it.

Thank you
I really appreciate your help.
Regards
Diego.

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Received on Mon May 10 2004 - 13:48:45 CDT