Matthias Drochner writes:
> Thanks - the "sendspace" made it. I've set it to 64k, as you
> suggested, and got ~15MB/s troughput.

It's looking better.

One thing to note is 64k of buffering still isn't all that much.  At
15MBytes/sec thats only a little over 4ms.  The buffers could well be
running dry.  It might be fun try to bump the buffers up even higher.

When I last played with this I found that for ftp I could bump the
buffers up to 246723.  (Any higher and I'd get errors.)

-wolfgang