Re: AW: locking with tuxedo
- From: Remigiusz Sokolowski <remigiusz.sokolowski@xxxxxxxxxx>
- To: Petr Novak <Petr.Novak@xxxxxxxxxxxx>
- Date: Mon, 10 Jan 2011 08:32:48 +0100
Petr Novak pisze:
> Hallo Remigiusz,
>
>
> I cannot answer your question, but may be you could look on these documents:
>
> http://www.oracle.com/technetwork/database/enterprise-edition/bestpracticesforxaandrac-128676.pdf
> http://www.oracle.com/technetwork/database/clustering/overview/distributed-transactions-and-xa-163941.pdf
Thank You for tips - very valuable indeed, especially the second link.
For those interested:
- it seems there is a possibility in case of distributed transactions,
that there is almost no trails for locks within the database. In short a
distributed transaction, before it becomes a transaction "in-doubt" by
timing out, when a transaction manager is disconnected, is not listed in
anywhere. Locks are held by the tracsaction manager, and the timeout
period must pass to recognize such transaction as "in-doubt" and list it
on dba_2pc_pending.
Regards
Remigiusz
>
>
> Best Regards,
> Petr
> ________________________________________
> Von: oracle-l-bounce@xxxxxxxxxxxxx [oracle-l-bounce@xxxxxxxxxxxxx]" im
> Auftrag von "Remigiusz Sokolowski [remigiusz.sokolowski@xxxxxxxxxx]
> Gesendet: Mittwoch, 5. Januar 2011 10:46
> Bis: oracle-l
> Betreff: locking with tuxedo
>
> hi,
>
> we hit from time to time the following issue:
> - some rows from a table are locked
> - there is no blocking session information and the session, which tries
> to acquire lock has blocking_session_status set to NO HOLDER
>
> The rows are locked by Tuxedo transaction. We suppose we hit the
> situation, when Tuxedo's TRAN_TIME is longer than
> distributed_lock_timeout and it seems setting those values to order
> TRAN_TIME<distributed_lock_timeout will solve this issue.
>
> Question is how/where to search for more information about the "thing"
> holding lock and if it is possible to release such lock for example by
> forcing a local rollback?
>
>
> Regards
> Remigiusz
>
>
> --
> Pole nakazi
>
> ----------------------------------------------------------------------
> Remigiusz Sokolowski <remigiusz.sokolowski@xxxxxxxxxx>
> pos : DBA at DIiUSI
> addr : Nordea Bank Polska SA, Luzycka 6A Street, 81-537 Gdynia, Poland
> phone : +48 58 667 17 43
> mobile: +48 602 42 42 77
>
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>
--
Pole nakazi
----------------------------------------------------------------------
Remigiusz Sokolowski <remigiusz.sokolowski@xxxxxxxxxx>
pos : DBA at DIiUSI
addr : Nordea Bank Polska SA, Luzycka 6A Street, 81-537 Gdynia, Poland
phone : +48 58 667 17 43
mobile: +48 602 42 42 77
--
//www.freelists.org/webpage/oracle-l
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