Sean Durkin:
> Hello Wietse,
>
> Am 10.09.2014 um 21:52 schrieb Wietse Venema:
>
> > Slow performance is typical for TCP window scaling problems. Have
> > you tried to turn it off in your kernel?
>
> Yes, Viktor suggested that also and I tried it. It does not make
> a difference, the problem persists.
What is the distribution of DATA sizes before failure? In your
example I see numbers around 3kB, 9kB, 12kB.
Some failures are triggered by packet content, and may be replaced
only by replacing hardware that operates marginally. Does the problem
go away when you
- Replace the server (either the network card or the whole box)
- Replace the cable that connects the server to the network switch
- Replace the network switch that the server is plugged into.
- Replace the cable that connects the switch to the router
- Replace the router
- And so on...
If you think this is a stupid idea, then you haven't been around
long enough.
Wietse
