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.
Any explanation and/or solutions to these two (seemingly) strange occurrences?
This is my DevTools
This is pm2 list
here is my javascript code
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();
});
}
});
}
