Re: [SLUG] Poor Gb network performance

["Martin Visser" <martinvisser99@xxxxxxxxx>]

Raphael,

A couple of things. 

1. If the servers are near each other, you might want to test with a direct patch between them. (Gigabit ports are auto-MDIX so straight-through or cross-over will do)

2. Use netstat -i -c and dstat to give you an idea if losses are due to CPU, physical errors, etc. 

3. I use the "iperf" utility as nice way to generate and measure throughput

4. I really would have second thoughts on using a non-managed switch (i;m guessing the netgear is). A managed switch will enable you to see stats about each port and help you to isolate where the problem might be

Martin

On 8/29/06, Raphael Kraus <rkraus@xxxxxxxxxxxxx> wrote:

> Also, I've seen problems with the Realteks in 2.6.9 kernels, that
seemed to go away with later 2.6 kernels (around 2.6.13, from memory).
> Given the debian box is 2.6.8, that might be an issue, so you might
want to try a later kernel.

That may be a good point, however as the machine is off-site, rather
critical, uses some compiled software and eth0 is less important (i.e.
it's our internal network - I'm more worried about large backups not
taking forever to transfer), I'm not too keen to upgrade the kernel just
at the moment  :^/

I'll discuss this with my colleage and we'll see if we can organise to
give it a crack...

Thanks heaps for all your help!

Regards,

Raphael Kraus
Software Developer
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Regards, Martin

Martin Visser