Re: weird

Hi!

After spending half of Saturday and Sunday digging around x$ktcxb and other interesting views I actually realized that the answer is way simpler :)

TADDR column in v$session points to *current* transaction state object, that means if recursive transaction is needed for wrapping or extending rollback segment, TADDR points to this recursive transaction. When your query happens to select at the same time, it sees statistics for the small recursive transaction, not your big one.

You should have been joining v$transaction.ses_addr with v$session.saddr instead of v$session.taddr with v$transaction.addr. (note there is a column recursive in v$transaction which allows to filter recursive transactions out)

I tested it on 9.2.0.3 with AUM, but it should be the same in earlier versions.
Tanel.

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Sunday, September 21, 2003 4:04 PM

>
> 8.1.7.4 No AUM.
> Either it was something goofy in the database, or something clobbered some
> bytes as they were going from the host machine to my telnet session ...
> which afaik would also be wierd since TCP/IP is supposed to guarantee
> delivery.
>
> The terminal session is on a Windows box ... maybe that's it!
>
> > -----Original Message-----
> >
> > Which version are you on?
> > Just wondering if it might have something to do with some bug
> > in automatic
> > undo management?
> >
> > Tanel.
> >
> > ----- Original Message -----
> > To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> > Sent: Friday, September 19, 2003 6:09 PM
> >
> >
> > >
> > > No question here. Just something weird. This is a
> > long-running insert
> > with
> > > NO NONE ZERO ZIP ZILCH NADA commit. It makes me wonder if
> > something weird
> > > is going on, or if I am overlooking something in the query.
> > >
> > > SQL> select a.username,sum(b.used_ublk) x from v$session a,
> > v$transaction
> > b
> > > where a.taddr=b.addr group by a.username;
> > >
> > > USERNAME X
> > > ------------------------------ ----------
> > > SYSTEM 418
> > >
> > > 1 row selected.
> > >
> > > SQL> /
> > >
> > > USERNAME X
> > > ------------------------------ ----------
> > > SYSTEM 893
> > >
> > > 1 row selected.
> > >
> > > SQL> /
> > >
> > > USERNAME X
> > > ------------------------------ ----------
> > > SYSTEM 2
> > >
> > > 1 row selected.
> > >
> > > SQL> /
> > >
> > > USERNAME X
> > > ------------------------------ ----------
> > > SYSTEM 3181
> > >
> > > 1 row selected.
> > >
> > > SQL> /
> > >
> > > USERNAME X
> > > ------------------------------ ----------
> > > SYSTEM 3204
> > > --
> > > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > > --
> > > Author: Stephen Lee
> > > INET: Stephen.Lee_at_DTAG.Com
> > >
> > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> > > San Diego, California -- Mailing list and web
> > hosting services
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> > >
> >
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> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > --
> > Author: Tanel Poder
> > INET: tanel.poder.003_at_mail.ee
> >
> > Fat City Network Services -- 858-538-5051 http://www.fatcity.com
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Stephen Lee
> INET: Stephen.Lee_at_DTAG.Com
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> San Diego, California -- Mailing list and web hosting services
> ---------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Tanel Poder
  INET: tanel.poder.003_at_mail.ee

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
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