Keep your Express server responsive even under heavy load! This trivial middleware uses toobusy-js library which is doing all the magic. Express-toobusy is just a handy wrapper middleware for Express.
app.use(require('express-toobusy')());If you want to specify your own max lag value, use it like this:
app.use(require('express-toobusy')(40));For details on max lag meaning and default values refer to toobusy-js documentation.