[erlang-questions] UDP receive performance
Wed Jun 20 22:00:11 CEST 2018
On Wed, Jun 20, 2018 at 12:07 PM Lukas Larsson <lukas@REDACTED> wrote:
> So if anyone is running a performance critical UDP server that has set the
> "recbuf" to a high value, I really recommend that you lower the "buffer"
> size to something close to the max expected packet size.
That's interesting because the official documentation says:
"It is recommended to have val(buffer) >= max(val(sndbuf),val(recbuf)) to
avoid performance issues because of unnecessary copying."
Maybe the documentation is wrong because that doesn't make much sense;
sndbuf and recbuf are sent to the kernel and are supposed to be bigger than
the user's buffer.
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