Re: deadlocks and redologs interaction

On Sep 11, 8:20 pm, carab1n3r <carab1..._at_hotmail.com> wrote:
> I'm still relatively green as a DBA, so excuse the possibly simple
> question...
>
> We have a DB that is seeing a lot of deadlocks, occasionally hundreds
> at a time. Yes, typically this is an external-application/development
> problem.
>
> However, I'm trying to determine and/or explain what impact lots-o-
> deadlocks has on redolog, particularly the switching. The reason I
> mention it is that during these "deadlock storms", we occasionally run
> out of redologs to switch to.
>
> The drumbeat I'm hearing is to "just add more redolog groups!!!" since
> that's easy to do, but we're only running into this redolog-switching
> problem during the deadlock storms, and my gut is that this is just a
> bandaid and will eventually not resolve the problem as deadlock rates
> continue to increase.
>
> So can someone explain to me (in such a way that I can explain it to
> others), when we have lots of deadlocks, what impact does that have on
> redologs?
>
> Thanks a lot in advance for the advice.

Hi,

Which version and OS is this running on? What do you mean by deadlocks? Are exceptions being thrown in the app with an ORAprefix ?

Regards,

Steve Received on Tue Sep 11 2007 - 19:32:36 CDT