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POnodejs memory leak in several cases
 

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  1. POnodejs memory leak in several cases
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    <ol> <li>the raw native tcp server I used a client test code to concurrent long connect the server, and do nothing。 After 5w conncetions I shut down the client.js, but the server side will have about 100M memory don't release.</li> </ol> <p>the server code ：</p> <pre><code>var net = require('net'); var server = net.createServer(function(client) { console.log('server connected'); client.on('data',function(){}); client.on('end',function(){console.log('end');}); }); server.listen(8124, function() { console.log('server bound'); }); </code></pre> <p>the client code:</p> <pre><code>var net = require('net'); var host = '192.168.0.110' // var host = "localhost" , port = 8124 for(var i=0; i &lt; 50000; i++){ var client = net.connect({host: host, port: port}, function(i){ return function() { //'connect' listener var num = i; console.log('client connected ' + num); }}(i) ); client.on('end',function(){ console.log('end'); client.end() }) } </code></pre> <p>the client is on another machine</p> <p>2, long loop</p> <pre><code> var a = b = c = d = []; console.log((process.memoryUsage().heapUsed / 1024 / 1024).toFixed(2), 'Mb'); for(i=0;i&lt;50000;i++){ a.push(new Date()); b.push(new Date()); c.push(new Date()); d.push(new Date()); } console.log((process.memoryUsage().heapUsed / 1024 / 1024).toFixed(2), 'Mb'); a = null; b = null; c = null; d = null; console.log('null'); console.log((process.memoryUsage().heapUsed / 1024 / 1024).toFixed(2), 'Mb'); console.log((process.memoryUsage().heapUsed / 1024 / 1024).toFixed(2), 'Mb'); setInterval(function(){ console.log((process.memoryUsage().heapUsed / 1024 / 1024).toFixed(2), 'Mb'); },5000); </code></pre> <p>I set the variable to null but the memory does not release. somebody tell me to use process.nextTick to prevent long loop but it still doesn't work.</p>
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    1. COYou are trying to do the stress on server or you want to know what happened to your server if reached 50k concurrent server? What @miktam said is correct, you have to wait the GC to clear the momory. If your server really reached 50 k concurrent users, i recommend you to scale out your server to avoid memory leaks.
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