node.js MySQL性能

Question

我在比较MySQL数据库的写入性能方面比较了node.js和PHP。我正在从此处使用Apache Benchmark，虚拟机中的Linux Mint，最新的mysql-
server（5.5.43）和用于带有node.js的MySQL驱动程序。我使用的代码是

server.js

var http = require('http');
var mysql = require('mysql');
var server = http.createServer(function (req, res) {

var connection = mysql.createConnection({
    host     : 'localhost',
    user     : 'root',
    password : 'root',
    database : 'testDB'
});

connection.connect();
connection.query("INSERT INTO Persons (LastName, FirstName, Address, City) VALUES ('Futterkiste', 'Alfreds', 'Obere Str. 57', 'Berlin')", function(err, rows, fields) {
    if (!err)
        console.log('The solution is: ', rows);
    else
        console.log('Error while performing Query.');
});

connection.end();

res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World');
});

server.listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');

index.php

$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "testDB";

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $sql = "INSERT INTO Persons (LastName, FirstName, Address, City) VALUES ('Futterkiste', 'Alfreds', 'Obere Str. 57', 'Berlin')";
    // use exec() because no results are returned
    $conn->exec($sql);
    echo "New record created successfully";
    }
catch(PDOException $e)
    {
    echo $sql . "<br>" . $e->getMessage();
    }

$conn = null;
echo "Hello world";
?>

使用index.php文件的Apache Benchmark到Apache2服务器

ab -n 1000 -c 100 http://localhost/

PHP MySQL写性能

Concurrency Level:      100
Time taken for tests:   1.328 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      230000 bytes
HTML transferred:       43000 bytes
Requests per second:    752.99 [#/sec] (mean)
Time per request:       132.804 [ms] (mean)
Time per request:       1.328 [ms] (mean, across all concurrent requests)
Transfer rate:          169.13 [Kbytes/sec] received

Apache Benchmark到server.js文件中的node.js服务器

ab -n 1000 -c 100 http://localhost:1337/

node.js MySQL的写入性能

Concurrency Level:      100
Time taken for tests:   3.896 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      113000 bytes
HTML transferred:       12000 bytes
Requests per second:    256.68 [#/sec] (mean)
Time per request:       389.585 [ms] (mean)
Time per request:       3.896 [ms] (mean, across all concurrent requests)
Transfer rate:          28.33 [Kbytes/sec] received

我的印象是，node.js在I / O数据库操作中胜过PHP。因此，无论我尝试使用哪个SQL语句（也尝试使用SELECT * FROM
Persons），node.js都变得更糟，这让我感到惊讶。

不仅如此，当并发​​级别为100时，节点还会记录大量“执行查询时出错”。消息发送到控制台，每1000个请求中只有500个被写入数据库。mysql节点驱动程序是那么糟糕还是我在这里做错了什么？我将衷心感谢您的帮助
：）

谢谢

Answer 1

首先，您没有完成server.js代码。与数据库打开的连接过多存在一个错误。为了解决这个问题，我使用了connectionPool。其次，Apache使用工作程序来并行运行同一脚本的许多副本。

现在将Apache + PHP + MySQL（XAMP）的结果作为参考点：

Concurrency Level:      100
Time taken for tests:   7.476 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      230000 bytes
HTML transferred:       42000 bytes
Requests per second:    133.77 [#/sec] (mean)
Time per request:       747.557 [ms] (mean)
Time per request:       7.476 [ms] (mean, across all concurrent requests)
Transfer rate:          30.05 [Kbytes/sec] received

现在等于我修复了server.js的机会

var http = require('http');
var mysql = require('mysql');
var connection = mysql.createPool({
    connectionLimit: 10,
    host     : 'localhost',
    user     : 'test',
    password : 'test',
    database : 'testDB'
});
var server = http.createServer(function (req, res) {
    connection.query("INSERT INTO Persons (LastName, FirstName, Address, City) VALUES ('Futterkiste', 'Alfreds', 'Obere Str. 57', 'Berlin')", function(err, rows, fields) {
        if (!err)
            console.log('The solution is: ', rows);
        else {
            console.log('Error while performing Query.');
        }
        res.writeHead(200, {'Content-Type': 'text/plain'});
        res.end('Hello World');
    });
});
server.listen(1337, '127.0.0.1');
server.on('close', function() {
    connection.end();
})
console.log('Server running at http://127.0.0.1:1337/');

和节点+ MySQL的结果：

Concurrency Level:      100
Time taken for tests:   7.289 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      112000 bytes
HTML transferred:       11000 bytes
Requests per second:    137.19 [#/sec] (mean)
Time per request:       728.899 [ms] (mean)
Time per request:       7.289 [ms] (mean, across all concurrent requests)
Transfer rate:          15.01 [Kbytes/sec] received

如您所见，结果非常接近。但这是针对11位Apache工作者的一个节点过程。如果将群集添加到方程中会怎样？这是修改后的代码：

var http = require('http');
var mysql = require('mysql');
var cluster = require('cluster');

if (cluster.isMaster) {
    cluster.fork();
    cluster.fork();
    cluster.fork();
    cluster.fork();
} else {
    var connection = mysql.createPool({
        connectionLimit: 10,
        host     : 'localhost',
        user     : 'test',
        password : 'test',
        database : 'testDB'
    });
    var server = http.createServer(function (req, res) {
        connection.query("INSERT INTO Persons (LastName, FirstName, Address, City) VALUES ('Futterkiste', 'Alfreds', 'Obere Str. 57', 'Berlin')", function(err, rows, fields) {
            if (!err)
                console.log('The solution is: ', rows);
            else {
                console.log('Error while performing Query.');
            }
            res.writeHead(200, {'Content-Type': 'text/plain'});
            res.end('Hello World');
        });
    });

    server.listen(1337, '127.0.0.1');
    server.on('close', function() {
        connection.end();
    })
    console.log('Server running at http://127.0.0.1:1337/ worker:' + cluster.worker.id);
}

四节点工作者结果：

Concurrency Level:      100
Time taken for tests:   2.782 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      112000 bytes
HTML transferred:       11000 bytes
Requests per second:    359.48 [#/sec] (mean)
Time per request:       278.179 [ms] (mean)
Time per request:       2.782 [ms] (mean, across all concurrent requests)
Transfer rate:          39.32 [Kbytes/sec] received

出于好奇，我添加了10个工作节点的结果：

Concurrency Level:      100
Time taken for tests:   2.647 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      112000 bytes
HTML transferred:       11000 bytes
Requests per second:    377.84 [#/sec] (mean)
Time per request:       264.665 [ms] (mean)
Time per request:       2.647 [ms] (mean, across all concurrent requests)
Transfer rate:          41.33 [Kbytes/sec] received

我的笔记本电脑是Core2Duo T6600，Ubuntu 14.04.3，php 5.5.9，节点0.10.37，mysql 5.5.44