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POWhat is reason that Node.Js application uses 90% of CPU?
 

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  1. POWhat is reason that Node.Js application uses 90% of CPU?
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    <p>I made simple notification application that subscribes to redis channel and when it will have new message then this application send it to user.</p> <pre><code> client.on("auth", function(sessId, userId){ console.log('AUTH: userId ' + userId) var userIdFromRedis; redis1.get('PHPREDIS_SESSION:' + sessId, function (err , reply) { if (reply){ reply = reply.toString(); var result = reply.match(/s:2:\"id\";i:(\d+);/); if (result) { userIdFromRedis = result[1] console.log('AUTH: userIdFromRedis ' + userIdFromRedis) } else { result = reply.match(/s:7:\"guestId\";i:(\d+);/); if (result) { var guestIdFromRedis = result[1] console.log('AUTH: guestIdFromRedis ' + guestIdFromRedis) } } if (userIdFromRedis == userId) { client.userId = userId; subscribe.subscribe(channelPrefix + userId); clients[userId] = client; client.emit("auth", {"success":true}); console.log('AUTH: result - ok') } else if (guestIdFromRedis) { client.guestId = guestIdFromRedis; subscribe.subscribe(channelPrefix + guestIdFromRedis); clients[guestIdFromRedis] = client; client.emit("auth", {"success":true}); console.log('AUTH: result - ok') } else { client.disconnect(); console.log('AUTH: result - fail') } } else { client.disconnect(); } }); }) subscribe.on("message", function(channel, message) { var userId = Math.round(channel.substr(channelPrefix.length)); if (client.userId == userId || client.guestId == userId) { console.log('Subscriber: ' + message) client.send(message); } }); client.on("message", function(text){ client.send(text); }) </code></pre> <p>And in log file sometimes in top hour I can find error message</p> <blockquote> <p>(node) warning: possible EventEmitter memory leak detected. 11 listeners added. Use emitter.setMaxListeners() to increase limit.</p> </blockquote> <p>And node.js application's process uses 90% of CPU. Please advice how can I resolve this problem?</p>
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    1. COmy guess would be that you are subscribing to "message"
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    2. COwhat do I need to subscribe to?
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