Re: Network interconnect traffic on RAC

From: Aaron Leonard <aachleon_at_gmail.com>
Date: Wed, 10 Feb 2010 12:56:56 -0600
Message-ID: <34f494ce1002101056p5947192cod8c1c1ea4096dd96_at_mail.gmail.com>

One thing to note though...the AWR won't show if your network or sysadmins have plugged other devices into your interconnect switch and started pumping other data through it. I recently ran into this, so make sure your interconnect switch is truly dedicated to RAC before completely relying on those AWR stats for this purpose.

On Wed, Feb 10, 2010 at 12:42 PM, Andrew Kerber <andrew.kerber_at_gmail.com>wrote:

> There is traffic statistics available in the AWR, but if you want more than
> that you would have to use some sort of network sniffer. However, I would
> think the AWR would be sufficient, I think it shows number of blocks in each
> direction,
>
>
> On Wed, Feb 10, 2010 at 12:34 PM, Karl Arao <karlarao_at_gmail.com> wrote:
>
>> Hi List,
>>
>>
>> How do you measure the network traffic going on your RAC interconnect?
>> on the Oracle and OS side...
>>
>> Can you share the efficient tools that you use?
>>
>> I'm trying to figure out (aside from the GC wait events popping out on
>> the AWR)... how would you know if your interconnect is congested?
>>
>> Let's say I had some RAC node evictions, I want to measure if it's
>> really the interconnect that is congested (I'm looking for the
>> numbers).. the same way that I'll be looking on the CPU scheduling and
>> disk IO issues...
>>
>>
>>
>>
>> - Karl Arao
>> karlarao.wordpress.com
>> --
>> http://www.freelists.org/webpage/oracle-l
>>
>>
>>
>
>
> --
> Andrew W. Kerber
>
> 'If at first you dont succeed, dont take up skydiving.'
>

--
http://www.freelists.org/webpage/oracle-l

Received on Wed Feb 10 2010 - 12:56:56 CST