Re: jumbo frames with non rac

From: Jeff Chirco <backseatdba_at_gmail.com>
Date: Fri, 11 Nov 2016 12:26:22 -0800
Message-ID: <CAKsxbLp2ScE34OUVnauOiZsf8zLO3Rxz9CSEtVmK3nhOpf_jTg_at_mail.gmail.com>



I am referring to use jumbo frames from the server to the storage, not user network.

On Fri, Nov 11, 2016 at 12:10 PM, Dimensional DBA < dimensional.dba_at_comcast.net> wrote:

> As Alfredo mentions you normally don’t use jumbo frames on the public
> facing networks as none of the clients normally have jumbo frames setup.
> This could be different if you were using say citrix desktops and ewveryone
> used those to access their applications then what you want may work.
>
> I have also used jumbo frames on storage networks to netapps or other
> network storage.
>
>
>
> *Matthew Parker*
>
> *Chief Technologist*
>
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>
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>
> *From:* oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_
> freelists.org] *On Behalf Of *Alfredo Abate
> *Sent:* Friday, November 11, 2016 11:55 AM
> *To:* Jeff Chirco
> *Cc:* kathy duret; oracle-l_at_freelists.org
> *Subject:* Re: jumbo frames with non rac
>
>
>
> Jeff,
>
>
>
> My understanding of using jumbo frames with Oracle RAC is to be able to
> increase the packet size of the *private interconnect* (heartbeat) of the
> cluster for better performance. This is normally done on segregated
> switches (or switch ports), NICs, etc so that they are all configured for
> the larger MTU size (9000).
>
>
>
> If you are considering enabling jumbo frames on the *public network* of a
> single instance (or even RAC) database server that your application servers
> or end users will directly be connecting to it can cause issues since most
> networks are configured for the normal MTU size (1500). This mismatch will
> potentially cause network issues such as packet drops when the two devices
> are communicating with each other.
>
>
>
> Alfredo
>
>
>
> On Fri, Nov 11, 2016 at 12:38 PM, Jeff Chirco <backseatdba_at_gmail.com>
> wrote:
>
> Sorry yes Oracle Linux 7 here and with hugepages. 11g database currently
> but plans to 12c.
>
>
>
> On Fri, Nov 11, 2016 at 9:15 AM, kathy duret <katpopins21_at_yahoo.com>
> wrote:
>
> I am assuming Linux here ...
>
>
>
> You will also need to set up hugepages and there are some other settings
> to consider like semaphores.
>
>
>
> There are many papers on how to do set this up. I would look on MOS first
> and then go fro there.
>
>
>
> *Kathy Duret*
>
>
>
>
> ------------------------------
>
> *From:* Jeff Chirco <backseatdba_at_gmail.com>
> *To:* "oracle-l_at_freelists.org" <oracle-l_at_freelists.org>
> *Sent:* Friday, November 11, 2016 10:30 AM
> *Subject:* jumbo frames with non rac
>
>
>
> We are in the middle of setting up replacing new database servers and been
> wondering about jumbo frames. We have 10gb network and we don't run RAC
> and not sure if we ever will but wondering if there still is a big benefit
> for jumbo frames? We also are running a new NetApp all flash storage.
>
> From what I have read so far is yes there is a benefit but just wondering
> if anyone has any opinions? I am not very knowledgeable on the network side
> of things.
>
> Thanks,
>
> Jeff
>
>
>
>
>
>
>

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Received on Fri Nov 11 2016 - 21:26:22 CET

Original text of this message