How to increase the amount of connections allowed per node?

[razb-viola]

I used autocannon in order to burst my api. I am trying to know how much connections are allowed to be opened simultaneously.
So far, if I create up to 300 concurrent connections, I can burst my API with 300k requests and all of them will be fulfilled.
If I increase it to 400-500 some requests will failed with ECONNECT -54 error.
The more concurrent connections I try to overload on the node is the more errors will be.

I know that in order to scale I should provision more nodes. But I am just researching and trying to understand how much connections, just one node, is practically can handle. And, if I can configure this my self - not that I want - just wanna find the limits as a research.

Thanks.

[theanarkh]

I think you can refer to backlog parameter in listen API.

[razb-viola]

Could you please write an example of how to utilize it the way I want? I tried to figure this out from the docs, but with no clue.

[marco-ippolito]

check https://nodejs.org/api/net.html#serverlisten backlog option