Re: wrong start_time and start_date in v$transaction

From: Mladen Gogala <gogala.mladen_at_gmail.com>
Date: Mon, 31 Aug 2020 14:40:23 -0400
Message-ID: <8ae943a5-8a86-d8e8-c5a2-d21562dd067e_at_gmail.com>



Hi Nenad!

That looks mighty strange. I have no idea how is that possible? Did you check your flux capacitors? Your server is behaving like certain DeLorean. As opposed to doc Brown, you can use Oracle Support. This should be a highly critical issue because you're getting wrong result.

Regards

On 8/31/20 7:14 AM, Noveljic Nenad wrote:
>
> v$transaction.start_time shows some time in the past before the
> session was event created:
>
> I observed this problem on some 18c and 19c databases.
>
> SQL> select start_time,start_date from v$transaction ;
>
> no rows selected
>
> SQL>
>
> SQL> select sysdate from dual ;
>
> SYSDATE
>
> ----------
>
> 31-08-2020
>
> SQL>
>
> SQL> create table t (n number) ;
>
> Table created.
>
> SQL>
>
> SQL> insert into t values(1) ;
>
> 1 row created.
>
> SQL>
>
> SQL> select start_time,start_date from v$transaction ;
>
> START_TIME           START_DATE
>
> -------------------- ----------
>
> 08/28/20 01:39:39    28-08-2020
>
> Does anybody have an idea how to approach this problem? I use the
> field for monitoring long open transactions.
>
> How critical might this be?
>
> Best regards,
>
> Nenad
>
> http://nenadnoveljic.com/blog/
>
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-- 
Mladen Gogala
Database Consultant
Tel: (347) 321-1217


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Received on Mon Aug 31 2020 - 20:40:23 CEST

Original text of this message