Re: STATSPACK - Rollback per transaction %
- From: Ken Payton <ken.payton@xxxxxxxxxxxxxxxxxx>
- To: Jared Still <jkstill@xxxxxxxxx>
- Date: Wed, 28 Dec 2005 17:17:15 -0500
Sounds correct. The problem seems to be with how statspack is reporting
Rollback per transaction %. Apparently, from Allen's discovery, it
seems statspack is using 'user rollbacks' as opposed to 'transaction
rollbacks' in it's calculation. It can be slightly alarming when in the
situation we were discussing earlier when working with connection
pools. Oracle should probably change their conversion to use
'transaction rollbacks', in the meantime it makes better sense for us to
perform our own calculation.
On Wed, 2005-12-28 at 15:04, Jared Still wrote:
> On 12/28/05, Allen, Brandon <Brandon.Allen@xxxxxxxxxxx> wrote:
> IIRC, when you issue a rollback and there isn't actually
> anything to be rolled back, then the 'transaction rollbacks'
> value in v$sysstat will not be incremented - only the 'user
> rollbacks' will be incremented. Someone please correct me if
> I'm wrong.
>
>
> A quick test seems to confirm this behavior on 9.2.0.6.
>
> 'user rollbacks' is always updated.
>
> 'transaction rollbacks' is updated when there is actually something to
> rollback.
>
> --
> Jared Still
> Certifiable Oracle DBA and Part Time Perl Evangelist
--
Kenny Payton
Software Architect
Public Records Group
Choicepoint, Inc.
ken.payton@xxxxxxxxxxxxxxxxxx
o: (770)752-4054
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