Re: DML blocking

From: Pap <oracle.developer35_at_gmail.com>
Date: Mon, 11 Jul 2022 15:15:23 +0530
Message-ID: <CAEjw_fg74Eh3NCXxa9kdLRU5wz=JJtYXZANPk=jig9gkKmrsaA_at_mail.gmail.com>



It does have 100+ columns but none of them are LOB. The column datatype are combination of Number, Varchar2, Char, Date, Timestamp datatype etc, but no LOB. On Mon, 11 Jul 2022, 2:59 pm Noveljic Nenad, <nenad.noveljic_at_vontobel.com> wrote:

> Does the affected table have any LOBs that aren’t cached?
>
>
>
> Best regards,
>
>
>
> Nenad
>
>
>
> *From:* oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> *On
> Behalf Of *Pap
> *Sent:* Montag, 11. Juli 2022 11:18
> *To:* Oracle L <oracle-l_at_freelists.org>
> *Subject:* DML blocking
>
>
>
> **** E-Mail from outside Vontobel:* Do not click on links or open
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>
> Hi We have a customer database on version 19.11.We saw all of sudden most
> of the session for a INSERT query got blocked and the wait event was
> showing as "enq: TT - contention [mode=4]" . And the blocking session
> appeared to be a session executing "ALTER database sql" as below. However ,
> wanted to know if its expected behavior to block application query doing
> DML on that same tablespace object or we are hitting any bug here?
>
>
>
> I see a doc "Resize Tablespace Hangs with TT Enqueue Contention (Doc ID
> 2595875.1)", but it says the ALTER statement itself will hang but doesnt
> tell anything on, if it will imact any DML on the object residing on that
> tablespace. It's a bigfile tablespace.
>
>
>
> alter database datafile '+DATA_XXXX/XXXXX/DATAFILE/data.XXX.XXXXXX' resize
> 10000G
>
>
>
>
>
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Received on Mon Jul 11 2022 - 11:45:23 CEST

Original text of this message