How to set maximum http client connections in Node.js

Question

I need to increase the number of outbound http sockets usable by a module I am writing. I know it is possible to do this globally using:

// increase max sockets
http.globalAgent.maxSockets = 1000;

What is the best pattern for authoring a module's maxSocket limit without affecting other modules?

Ohad Kravchick · Accepted Answer · 2013-03-14 15:15:56Z

3

Your best option is to pass an Agent object to every http and https request you are making, with maxSockets configured to your liking. This will have no effect on other modules. See http://nodejs.org/docs/latest/api/http.html#http_http_request_options_callback.

If you are using a framework yourself, rather than relying on the http module directly, it might be difficult and require some patching.

answered Mar 14, 2013 at 15:15

Ohad Kravchick

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Timothy Strimple · Accepted Answer · 2012-12-01 02:30:15Z

-1

Given that the setting determines how many concurrent connections are available per host, there is no way to set this specifically for individual modules. What you should do however is make sure that you're not reducing the number of concurrent connections from what the user has already specified. For example, if someone sets their maxSockets to 5000, and you set it to 1000 in your module, bad things could happen. I would recommend something like the following

var max = 1000;
if(http.globalAgent.maxSockets < max) {
    http.globalAgent.maxSockets = max;
}

answered Dec 1, 2012 at 2:30

Timothy Strimple

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1 Comment

thesmart Over a year ago

Not the answer. Looking for a way to author modules with a non-global max socket limit

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