Re: RMAN performance issue after patching OS

UEK 5.4.17 is the latest and the greatest Oracle kernel. It is quite possible that some old network drivers are no longer supported. Furthermore, if the servers in question are virtual machines, you may need to check vmware drivers. I remember some fun with VMWare network drivers a long, long time ago, in the company far, far away.

On 8/24/21 1:17 PM, Jay Hostetter wrote:
> Good afternoon,
>
>   Many of our database servers are running Oracle Linux Kernel Release
> 5 Update 4.  We have been patching these servers and discovered our
> RMAN performance (to NFS shares) has suddenly dropped ( from 100+ mb/s
> to 10 mb/s).  It took us quite some time to figure out that it is
> actually the OS patch that is causing the issue.  We even applied the
> latest patch (Kernel Release 6 Update 2), but we are still running
> into the same issues.
>   Has anybody else encountered this issue?  We have not made any
> changes to the mount options for our shares.  We haven't made any
> changes to the NFS server itself.  We ran a backup to local disk,
> moved underlying storage for NFS, etc. We finally determined that it
> is caused by our OS patch.
>   Any help would be appreciated.
>
> Thank you,
> Jay Hostetter

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Mladen Gogala
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https://dbwhisperer.wordpress.com

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