Socket.io memory doesn't drop of after clients disconnect

I use the most simple example

var app = require('http').createServer(handler)
var io = require('socket.io')(app);
var fs = require('fs');

app.listen(1994);

function handler(req, res) {
    res.end('socket.io start')
}

io.on('connection', function(socket) {});

I use socket.io-client, create a 4k connections Then I closed the client, find memory doesn’t drop.

socket.on('disconnect', funtion() {
    delete io.sockets[socket.id];
    delete io.sockets.sockets[socket.id];
});

heapUsed decreased slightly rss and heapTotal without any change

SOS

The memory is cleaned up by the garbage collectors periodically. But I waited for half an hour, still no change. Can I only use global.gc() to forcibly reclaim memory it?

@nuclearace

[will-hang]

lol was this fixed? i’m scared to use sockets.io because i keep hearing about this issue

[darrachequesne]

That issue was closed automatically. Please check if your issue is fixed with the latest release, and reopen if needed (with a fiddle reproducing the issue if possible).