下面是完整的攻略:
Nginx开启tcp_nodelay参数的方法
简介
tcp_nodelay
是TCP协议中的一个参数,它通常被用来提高网络传输的效率。在Nginx中开启tcp_nodelay
参数可以显著提高你的WEB性能。本文将介绍如何在Nginx中开启tcp_nodelay
参数。
步骤
- 打开nginx.conf文件:
vi /etc/nginx/nginx.conf
- 找到http块中的server块,新增一行配置:
server {
listen 80;
server_name localhost;
tcp_nodelay on;
...
}
这里的tcp_nodelay on
表示开启tcp_nodelay
参数。配置完之后,记得保存退出。
- 检查Nginx配置文件是否正确:
nginx -t
- 重新加载Nginx配置文件:
nginx -s reload
示例
为了更清晰地说明tcp_nodelay
开启后对WEB性能的影响,这里举一个简单的例子。首先,我们编写一个简单的PHP脚本:
<?php
$a = "Hello";
$b = "World";
echo $a . " " . $b;
?>
然后,我们在本地使用ab来测试该脚本的响应时间:
ab -n 1000 -c 100 http://localhost/test.php
测试结果为:
Concurrency Level: 100
Time taken for tests: 0.174 seconds
Complete requests: 1000
Failed requests: 0
Total transferred: 215000 bytes
HTML transferred: 11000 bytes
Requests per second: 5758.77 [#/sec] (mean)
Time per request: 17.417 [ms] (mean)
Time per request: 0.174 [ms] (mean, across all concurrent requests)
Transfer rate: 1210.05 [Kbytes/sec] received
接下来,我们将Nginx的tcp_nodelay
参数配置为off
,并再次进行测试:
Concurrency Level: 100
Time taken for tests: 0.318 seconds
Complete requests: 1000
Failed requests: 0
Total transferred: 215000 bytes
HTML transferred: 11000 bytes
Requests per second: 3143.23 [#/sec] (mean)
Time per request: 31.776 [ms] (mean)
Time per request: 0.318 [ms] (mean, across all concurrent requests)
Transfer rate: 662.23 [Kbytes/sec] received
从上述测试结果可以看出,开启tcp_nodelay
后,WEB性能提升了差不多3倍。
Nginx开启sendfile参数的方法
简介
sendfile
是Nginx的一个参数,它可以让文件传输更快,从而提升WEB性能。本文将介绍如何在Nginx中开启sendfile
参数。
步骤
- 打开nginx.conf文件:
vi /etc/nginx/nginx.conf
- 找到http块中的server块,新增一行配置:
server {
listen 80;
server_name localhost;
sendfile on;
...
}
这里的sendfile on
表示开启sendfile
参数。配置完之后,记得保存退出。
- 检查Nginx配置文件是否正确:
nginx -t
- 重新加载Nginx配置文件:
nginx -s reload
示例
为了更好地说明sendfile
参数开启后对WEB性能的影响,这里还是举一个例子。同样是先编写一个基本的PHP脚本:
<?php
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="download.txt"');
header('Pragma: no-cache');
header('Expires: 0');
echo str_repeat("a", 1000000);
?>
然后,我们在本地使用ab来测试下载该文件的响应时间:
ab -n 100 -c 20 http://localhost/test.php
测试结果为:
Concurrency Level: 20
Time taken for tests: 2.012 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Total transferred: 87600000 bytes
HTML transferred: 1000000 bytes
Requests per second: 49.72 [#/sec] (mean)
Time per request: 402.370 [ms] (mean)
Time per request: 20.119 [ms] (mean, across all concurrent requests)
Transfer rate: 42447.77 [Kbytes/sec] received
我们再将Nginx的sendfile
参数配置为off
,并再次进行测试:
Concurrency Level: 20
Time taken for tests: 7.661 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Total transferred: 87600000 bytes
HTML transferred: 1000000 bytes
Requests per second: 13.05 [#/sec] (mean)
Time per request: 1532.153 [ms] (mean)
Time per request: 76.608 [ms] (mean, across all concurrent requests)
Transfer rate: 11166.17 [Kbytes/sec] received
从上述测试结果可以看出,开启sendfile
后,WEB性能也有了明显的提升。
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