PM2

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问题描述

当我的节点 js 服务器通过 pm2 运行时，在 DevTools 中检查时，它的内存使用率读数高于应用程序中的实际内存堆.更重要的是，pm2 中 memory 下的值随着时间的推移缓慢增加，可能表明某种内存泄漏.在 DevTools 中也无法观察到这种内存使用量的缓慢增加.

When my node js server is running via pm2, it has a higher memory usage reading than the actual memory heap in the application when inspected in DevTools. More so, the value under memory in pm2 slowly increases over time, possibly indicating some kind of memory leak. This slow increase in memory usage also cannot be observed in DevTools.

对这两个(看似)奇怪的事件有任何解释和/或解决方案吗?

Any explanation and/or solutions to these two (seemingly) strange occurrences?

这是我的开发工具

这是pm2列表

这是我的javascript代码

var SSE = require('sse');
var https = require('https');
var fs = require('fs');
var url = require('url');
var mysql = require('mysql');
var schedule = require('node-schedule');

var options = {
    key: fs.readFileSync('pathto/ssl.key'),
    cert: fs.readFileSync('pathto/ssl.crt'),
    ca: fs.readFileSync('pathto/ssl.ca-bundle')
};


var pool = mysql.createPool({
    connectionLimit: 100,
    host: "host",
    user: "user",
    password: "pass",
    database: "db"
});

async function connectandrun() {
    try {

        var server = https.createServer(options, function(req, res) {
            var queryData = url.parse(req.url, true).query;
            res.writeHead(200, {
                'Content-Type': 'text/event-stream',
                'Access-Control-Allow-Origin': '*',
                'Cache-Control': 'no-cache',
                'Connection': 'keep-alive',
                'Access-Control-Allow-Methods': 'GET,PUT,POST,DELETE,OPTIONS',
                'Access-Control-Allow-Headers': 'Origin, X-Requested-With, Content-Type, Accept'
            });

            if (queryData.connectionid) {
                var connecitonid = queryData.connectionid;
            } else {
                var connecitonid = "";
            }

            var myconection = "myconnecction" + connecitonid;
            var uuserjson = {};
            uuserjson[myconection] = {
                Data: {
                    Element: null
                }
            };

            schedule.scheduleJob('*/3 * * * * *', function() {
                var runninginstance = main(uuserjson, queryData, myconection, res).catch(console.error);
                runninginstance = null;
            });

            res.on("close", function() {
                res.end();
                uuserjson[myconection] = null;
                myconection = null;
                connecitonid = null;
            });
        });

        server.listen(3000, '0.0.0.0', function() {
            var sse = new SSE(server);
            sse.on('connection', function(client) {
                client.send('hi there!');
            });
        });

    } finally {}
}

connectandrun().catch(console.error);

async function main(uuserjson, queryData, myconection, res) {


    pool.getConnection(function(err, con) {
        if (err) {
            console.log(err);
        } else {
            con.query("MYSQL QUERY",
                function(err, result, fields) {
                    if (err) throw err;
                    if (result.length != 0) {
                        uuserjson[myconection] = {
                            Data: {
                                Element: result[0]
                            }
                        };

                        if (result[0]) {
                            res.write("retry: 30000\n\n" + "event: blanks\ndata: " + result[0] + "\n\n");
                        }
                    }

                    con.release();
                });
        }
    });

}

PM2 - 不正确的内存使用读数 &amp;Node.js 应用程序可能存在内存泄漏

问题描述

推荐答案

PM2 - 不正确的内存使用读数 &Node.js 应用程序可能存在内存泄漏