Re: Sudden Backup Slowdown

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On Mon, 4 Nov 2019, 2:29 pm Charlotte Hammond, <dmarc-noreply_at_freelists.org> wrote:

> Hello All,
>
> I'm trying to explain why my level 0 rman backups have suddenly jumped
> from 8hours to 12 hours. The size of the backup has barely changed and
> there has been no configuration changes. AWR and O/S statistics show that
> CPU for all the channels are maxed out at ~99% (presumably backup
> compression) for most of this time, both in the 8 hour case and 12 hour
> case. The server itself has no other activity during the backup window.
>
> This is on 11.2.0.4 on AWS EC2 backing up to S3 storage.
>
> I'm not looking for tuning advise here (thanks though!) - I'm really
> hoping for some advise on finding an explanation for the change in times.
> Given that all it's doing is sitting on CPU I'm not sure what else I can
> investigate - especially with limited ability to cross-reference it with
> the "good old" runs. It's been 8 hours for months and months, and has now
> been 12 hours for the last 3 weeks. There was no gradual increase - just
> a step change.
>
> Thanks!
> Charlotte
>
>
>

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