太多的mysql连接/优化mysql查询

Question

使用我的节点应用程序几次后，我总是遇到太多MySQL查询的问题。目前我使用的是MySQL连接池，它已经提高了稳定性，但不是最终的解决方案。

有没有更好的方法连接到MySQL数据库并在查询后直接关闭连接？

一般＆＃34; MySQL连接＆＃34;：

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const mysql = require('mysql');
const config = require('config');
const dbConfig = config.get('Azure.dbConfig');

console.log(`used mysql information: ${dbConfig}`);
const con = mysql.createPool(dbConfig
);

con.on('enqueue', () => {
    console.log('connection enqued')
});
con.on('connection', function (connection) {
    connection.query('SET SESSION auto_increment_increment=1')
});

con.on('release', function (connection) {
    console.log('Connection %d released', connection.threadId);
});

module.exports = con;

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MySQL查询示例：

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const con = require('../db.js');
const bodyParser = require('body-parser');



module.exports = function (app) {
    
    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({
        extended: true
    }));

    app.get('/dbCompareName', function (req, res) {

        const ingredients = [];

        con.query('SELECT wm_wine.name, wm_wine.avocandoIngredient, wm_wine.jahrgang, wm_wine.sorte, wm_cart.anzahl, wm_wine.typ from wm_wine INNER JOIN wm_cart on wm_cart.id = wm_wine.id', function (err, result, info) {
            if (err) {
                console.log('while querying the mysql database, an error occurred');
                console.log(err);
                if (err.fatal === true) {
                    con.connect(err => {
                        if (err) throw err;
                        logger.info('reconnected to mysql database');
                    });               
                };
            }
            else {
                const transfer = result;
                
            };

};

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