FAQ
Aha, here's a fun clue:

Aug 21 09:32:01 localhost kernel: [18603209.749683] nf_conntrack: table
full, dropping packet.

Quick google search leads me
to /proc/sys/net/ipv4/netfilter/ip_conntrack_max

which I doubled (to 131072), and now I can get 131056 consistently.

On Wed, Aug 21, 2013 at 2:30 AM, Kyle Lemons wrote:

Do you have a C program that can do this? I have been playing around and
still can't exceed 65518 outgoing connections even across 64 processes,
regardless of how many destination IPs I use.

I'm more and more convinced that this is a linux issue, not a Go issue.


On Wed, Aug 21, 2013 at 1:18 AM, Paul van Brouwershaven <
paul@vanbrouwershaven.com> wrote:
On Wed, Aug 21, 2013 at 10:06 AM, Kyle Lemons wrote:

for a total of 65514. No tuning other than what you posted in
https://code.google.com/p/go/issues/detail?id=6176#c4
This is still lower than the 65535, the slight difference why you can't
reach the 655535 exactly is more depending on other connections running on
your test machine.

But it's the intention to pass this 65535, which in this case should be
go up to 7 (ip numbers) * 65535 (ports) = 458745 outgoing connections.

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