[j-nsp] Routing-Instance Removal Memory Savings

[Jose Madrid]

Thank you to everyone on this list for being so helpful.

On Wed, Mar 17, 2010 at 2:32 PM, Richard A Steenbergen <ras at e-gerbil.net> wrote:
> On Wed, Mar 17, 2010 at 12:27:11PM -0400, Jose Madrid wrote:
>> Hello everyone,
>>
>> I have a customer who is using a routing-instance per provider on an
>> M7i.  There is no real reason for this doing this and he only has it
>> this way due to a previous consultant who decided that would be best.
>> The box is running hot and sits at 93% memory utilization.  I am
>> trying to calculate the memory savings from removing the
>> routing-instance and just incorporating the routes into the main
>> instance, which is being done by policy anyway.  Any idea how I can
>> find out a real number savings or a percentage? Here is the output of
>> a "show route instance".  Any help would be much appreciated.  Thank
>> you.
>
> $10 says I can guess who the consultant was. :)
>
> There isn't exactly an easy way to calculate it, but I think you'd be
> pretty safe ballparking it at "a couple hundred megs". You'd still have
> the same total number of paths and adj ribs, but you'd be eliminating
> two complete ribs worth of extra routes... ~200MB sounds pretty
> realistic, *maybe* more depending on the number of attributes
> (communities, etc) and how your multipath config works out.
>
> --
> Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
> GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
>



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