socket.io内存泄漏的问题
我写了一个socket.io的demo，想用websocket-bench来测试一下socket的并发量和最大连接数，结果发现测试结束后，所有socket都与服务器断开连接了，但是内存好像没有释放掉，不知道是我代码写的有问题还是有哪些使用socket的过程中需要注意的我没注意。
'use strict'
var app = require('koa')();
var serve = require('koa-static');
var _ = require('underscore');
var config = require('../config.js');
var n = 0;
const port = process.env.PORT || 3000;
var clients = {};
var clientCache = [];
for(let i = 100000; i <= config.n; i++) {
clientCache.push(i);
}
clientCache = _.shuffle(clientCache);
app.use(serve('.'));
var server = require('http').Server(app.callback()),
io = require('socket.io')(server);
io.on('connection', function(socket) {
let randomNumber = clientCache.pop();
let total = 0;
clients[randomNumber] = socket;
console.log(`new customer come, total: ${++n}`);
socket.emit('server', {
server: 'Server1',
port: port
});
socket.on('msg', (data) => console.log(`收到${++total}条消息，耗时${new Date() - new Date(data.dateTime)}ms`));
socket.on('error', (err) => console.log(err, 11));
socket.on('disconnect', function(socket) {
console.log(`delete customer, total: ${--n}`);
delete clients[randomNumber];
})
})
server.listen(port, () => console.log('listening on : ' + port));
例如我连接10000个，可能内存就到1.7G了，结束掉websocket-bench进程后，1.7G的内存一点都没释放掉
16 回复
試試
socket.on('disconnect', function(socket) {
console.log(`delete customer, total: ${--n}`);
clients[randomNumber] = null;
delete clients[randomNumber];
}
再試試
socket.on('disconnect', function(socket) {
console.log(`delete customer, total: ${--n}`);
delete io.sockets.sockets[socket.id];
clients[randomNumber] = null;
delete clients[randomNumber];
}
如果不行 再確定client的socket物件沒用存在其他的節點上 再不行,看看你是用那一版的socket.io,如果不是新版的請更新看看
node --expose-gc app.js
添加一个参数再运行，代码中调用
global.gc();
大部分的内存是被engine.io扩展给消耗了，非托管的内存V8无法主动去管理的
