topic Re: 1Gb Throughput in VMware Solutions Discussions

1Gb Throughput

ismopuuronen — Thu, 05 Jun 2025 06:19:21 GMT

Hi,

Just a technical question:

If I have one network port (1Gb) in use, what would be "normal" throughput for it?

Net in kB/s output from >sysstat, could be example something like 80000kB/s.

I assume that value includes overheads/encoding as well, so where does rest of the

bandwidth go, or what is the most common bottleneck? (Simple math is 1Gb = 122070kB)

Is it possible to get example 110MB/s in any circumstances?

Br.

Ismo.

AGUMADAVALLI — Mon, 10 Sep 2012 13:48:26 GMT

You may achieve 110mb/s if layer 2 but specific settings but what you are seeing is very fair and rest is used by tcp offload kind of.

thank you,

AK G

ismopuuronen — Mon, 10 Sep 2012 15:56:39 GMT

Hello,

Do I get it right.

1Gb uses 8b/10b encoding = 20%

Overhead = "5%"

So if 80MB/s is ok.

The actually data what's going to be written to disks,

is actually 80MB/s - 25%, about 60MB/s.

Br.

Ismo.