socket.io隨着時間的推移，內存使用量不斷增加

Question

我可以做些什麼來使內存保持在合理的水平？
在我啓動服務器之前，我有大約140MB的RAM。
16個小時後，我剩下大約4mb的免費公羊。
我在256MB內存rackspace雲上運行這個。

var maxMsgs = 50; 
var express = require('express'), sio = require('socket.io'), redis = require('redis'), RedisStore = require('socket.io/lib/stores/redis'); 
var app = express.createServer(), pub = redis.createClient(), sub = redis.createClient(), client = redis.createClient(); 
app.configure(function() { 
    app.use(express.bodyParser()); 
    app.use(express.cookieParser()); 
    app.use(express.static(__dirname + '/public')); 
    app.use(app.router); 
}); 

app.get('/', function (req, res) { 
    res.sendfile(__dirname + '/index.html'); 
}); 
app.listen(8002, function() { 
    var addr = app.address(); 
    console.log('app listening on http://' + addr.address + ':' + addr.port); 
}); 

var io = sio.listen(app, {log: false}), nicknames = {}, history = [], user_count = 0, topic = {topic: '', setBy: 'Server'}, ytvid = {vid: '', setBy: 'Server'}; 
io.enable('browser client minification'); 
io.enable('browser client etag'); 
io.enable('browser client gzip'); 
io.set('store', new RedisStore({redisPub : pub, redisSub : sub, redisClient : client})); 
//io.set('resource', 'socket'); 

io.sockets.on('connection', function(socket) { 
    socket.on('join', function(cu) { 
    if(cu.username && cu.username != 'Guest') { 
     socket.nickname = cu.username; 
     socket.emit('connected', nicknames, history, topic, ytvid); 
     nicknames[cu.username] = cu; 
     socket.broadcast.emit('nicknames', nicknames); 
     user_count++; 
     //socket.broadcast.emit('announcement', {msg: socket.nickname + ' connected'}); 
    } 
    }); 
    socket.on('message', function(msg, cb) { 
    if(msg.msg && msg.msg != '') { 
     msg.time = Date.now()/1000; 
     history.push(msg); 
     while(history.length > maxMsgs) history.shift(); 
     cb(true, msg.time); 
     socket.broadcast.emit('message', msg); 
    } 
    }); 
    socket.on('stopic', function(t) { 
    if(t.topic && t.setBy && t.topic != '') { 
     topic = t; 
     io.sockets.emit('topic', t); 
    } else { 
     topic = {topic: 'No topic set', setBy: 'Admin'}; 
     io.sockets.emit('topic', topic); 
    } 
    }); 
    socket.on('sytvid', function(v) { 
    if(v.vid && v.setBy && v.vid != '') { 
     ytvid = v; 
     io.sockets.emit('ytvid', v); 
    } else { 
     ytvid = {vid: false, setBy: 'Admin'}; 
     io.sockets.emit('ytvid', ytvid); 
    } 
    }); 
    socket.on('get debug', function() { 
    socket.emit('debug', {users: nicknames, history: history, user_count: user_count, topic: topic}); 
    }); 
    socket.on('send command', function(c) { 
    if(c.type == 'empty') history = []; 
    io.sockets.emit('command', c); 
    }); 
    socket.on('disconnect', function() { 
    if(!socket.nickname) return; 
    if(!nicknames[socket.nickname]) return; 
    //nicknames[socket.nickname].status = 'offline'; 
    delete nicknames[socket.nickname]; 
    //socket.broadcast.emit('announcement', {msg: socket.nickname + ' disconnected'}); 
    socket.broadcast.emit('nicknames', nicknames); 
    user_count--; 
    }); 
}); 

function inArray(needle,haystack){for(var key in haystack){if(needle===haystack[key]){return true;}}return false;} 
function zeroPad(digits,n){n=n.toString();while(n.length<digits){n='0'+n;}return n;} 
function time(time){if(time==null)time=new Date();else if((time instanceof Date)===false)time=new Date(time);return time;} 

Answer 1

看起來像socket.on問題（ '加入'）點。

我建議你開始使用

var profiler = require('v8-profiler'); 
setInterval(function() { 
    profiler.takeSnapshot('snappy'); 
},1000); 

喜歡這裏描述http://code.google.com/p/v8/wiki/V8Profiler

所以，你現在哪裏是你的泄漏開始。

又仔細檢查每個變量，對象和範圍的分配和解除分配。

讓我知道如果你有問題。

Answer 2

Some people think that socket.io leaks memory when using websockets transport。嘗試禁用它。沿着線的東西：

io.configure('production', function(){ 
    io.enable('browser client etag'); 
    io.set('log level', 1); 

    io.set('transports', [ 
    , 'htmlfile' 
    , 'xhr-polling' 
    , 'jsonp-polling' 
    ]); 
}); 

Also heroku has to say the following