创建mysql池如何解决 8小时不响应数据库断开情况

程序如下：请问如何解决mysql8小时无请求自动断开的问题，应该在那个部分进行判断

var mysql = require(‘mysql’); var DB_NAME = ‘DB_name’;

var pool = mysql.createPool({ host : ‘localhost’, user : ‘root’, password : ‘123’, port: ‘3306’ });

pool.on(‘connection’, function(connection) { connection.query(‘SET SESSION auto_increment_increment=1’); });
pool.getConnection(function(err, connection) {

var useDbSql = "USE " + DB_NAME;
connection.query(useDbSql, function (err) {
     if (err) {
        console.log("USE Error: " + err.message);
        return;
     }
     console.log('USE succeed');
});

}