Node.js Node.js Performance Increase maxSockets
Example
Basics
require('http').globalAgent.maxSockets = 25
// You can change 25 to Infinity or to a different value by experimenting
Node.js by default is using maxSockets = Infinity at the same time (since v0.12.0). Until Node v0.12.0, the default was maxSockets = 5 (see v0.11.0). So, after more than 5 requests they will be queued. If you want concurrency, increase this number.
Setting your own agent
http API is using a "Global Agent". You can supply your own agent. Like this:
const http = require('http')
const myGloriousAgent = new http.Agent({ keepAlive: true })
myGloriousAgent.maxSockets = Infinity
http.request({ ..., agent: myGloriousAgent }, ...)
Turning off Socket Pooling entirely
const http = require('http')
const options = {.....}
options.agent = false
const request = http.request(options)
Pitfalls
-
You should do the same thing for
httpsAPI if you want the same effects -
Beware that, for example, AWS will use 50 instead of
Infinity.
