Mailinglist Archive: opensuse (1018 mails)

[John Andersen <jsamyth@xxxxxxxxx>]

On 6/5/2012 4:14 PM, Linda Walsh wrote:
>      A bit annoying at the ignorance shown by various engineers -- thinking that
> 4k writes are still optimal -- when I asked for a increased buffer size on 
> Tbird (and
> FFox, I was told that the network only transfers a max of 1500 bytes/packet,
> so anything more than that was a waste.

Once it gets off your network, those assumptions are probably true.
There was a series of article on Bufferbloat that brought this issue to light
with regard to connections over the internet.
http://gettys.wordpress.com/2010/12/03/introducing-the-criminal-mastermind-bufferbloat/

You might be able to claim that 16M transfer size is optimal in your 
environment,
but all it takes is replacing one switch in your network to have that idea 
shattered.

Getting data to your Ethernet card's buffer is but the first step, and it is a 
step
handled by a processor with a lot of horsepower, backed by a lot of ram.

From then on stuff gets handled by devices with vastly smaller buffers, and 
vastly
weaker processors.



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