Do not use up with node v0.10.0 (v0.10+?)

[cmawhorter]

If up becomes saturated with (very) minimal traffic, the server will become unresponsive to requests and memory usage will skyrocket along with CPU.

I only tested locally, so it's possible it might just be me, but I doubt it.

You may see this message:

(libuv) Failed to create kqueue (24)

index.js

process.title = 'up-test';

var up = require('up')
    , server = require('http').Server().listen(3100);

var srv = up(server, __dirname + '/blah.js', {
        numWorkers: 4
});

blah.js

process.title = 'up-test-worker';

var http = require('http');

module.exports = http.Server(function (req, res) {
  res.writeHead(200);
  res.end('Hello World');
  console.log('connection...' + new Date());
});

setInterval(function() { console.log(process.pid + ' waiting for conntections...'); }, 5000);

Use apache's benchmarking tool:

ab -n16 -c8 http://localhost:3100/

c can be anything > numWorkers n should be anything > c

On rare occasions, the above command will succeed without causing errors. Might want to try higher numbers.

I didn't investigate too deeply beyond "oh... up is broken", but I think it has something to do with this: http://stackoverflow.com/a/15537504/670023

I think this was discussed in #62, but I wanted to make something more prominent and supply a test.