夜色空凝

启用

/path/to/7.4/php.ini

[opcache]

zend_extension=opcache.so

; 1.启用，默认禁用
opcache.enable=1

; 是否用于cli，同opcache.enable
opcache.enable_cli=1

; 由于我希望在php-fpm启动后，不检查文件的变化（减少没必要的资源开支），这里我设置为0；如果设置为1，那么opcache.revalidate_freq生效
opcache.validate_timestamps=0

; 注意这里我注释了，1.表示每秒检查文件变化，0表示每个请求都检查文件变化
; opcache.revalidate_freq=2

重启php-fpm:

kill -usr2 $(cat /path/to/php-fpm@7.4.pid)

使用ab命令测试效果

这是我的测试代码：

// plus.php
<?php

for($i=0, $total = 0;$i<=10000000;$i++){
    $total += $i;
}

echo $total;

ab命令如下：

ab -c 5 -n 50 'https://blog.yeskn.com/plus.php'

开启之前：

Document Path:          /plus.php
Document Length:        14 bytes

Concurrency Level:      5
Time taken for tests:   3.745 seconds
Complete requests:      50
Failed requests:        0
Total transferred:      7800 bytes
HTML transferred:       700 bytes
Requests per second:    13.35 [#/sec] (mean)
Time per request:       374.523 [ms] (mean)
Time per request:       74.905 [ms] (mean, across all concurrent requests)
Transfer rate:          2.03 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       27   34   3.9     33      43
Processing:   147  317  74.9    300     443
Waiting:      146  317  74.9    300     443
Total:        189  350  74.7    333     476

Percentage of the requests served within a certain time (ms)
  50%    333
  66%    389
  75%    418
  80%    435
  90%    469
  95%    471
  98%    476
  99%    476
 100%    476 (longest request)

开启之后：

Document Path:          /plus.php
Document Length:        14 bytes

Concurrency Level:      5
Time taken for tests:   2.467 seconds
Complete requests:      50
Failed requests:        0
Total transferred:      7800 bytes
HTML transferred:       700 bytes
Requests per second:    20.27 [#/sec] (mean)
Time per request:       246.721 [ms] (mean)
Time per request:       49.344 [ms] (mean, across all concurrent requests)
Transfer rate:          3.09 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       27   34   4.6     33      47
Processing:   102  197  52.4    188     295
Waiting:      101  197  52.4    188     295
Total:        135  231  52.2    229     327

Percentage of the requests served within a certain time (ms)
  50%    229
  66%    266
  75%    279
  80%    285
  90%    300
  95%    311
  98%    327
  99%    327
 100%    327 (longest request)

可以看到，QPS提升了大概0.5倍，并且速度提升很大，启用opcache后，最慢的请求只有327ms，没启用时，50%的请求都要大于333ms，提升效果显著。

以上测试用的是默认配置，如果进行合理的配置，我相信优化会更加明显！

由于wordpress建议安装imagick，而它默认没有加入到php源码中，于是记录一下自己编译安装imagick扩展的过程：

wget https://pecl.php.net/get/imagick-3.4.4.tgz
tar -xvf imagick-3.4.4.tgz && cd imagick-3.4.4

/usr/local/opt/php@7.4/bin/phpize

# 这个目录似乎没用到
mkdir /usr/local/opt/imagick

./configure --prefix=/usr/local/opt/imagick --with-php-config=/usr/local/opt/php@7.4/bin/php-config

报错：

checking ImageMagick MagickWand API configuration program... checking Testing /usr/local/bin/MagickWand-config... Doesn't exist
checking Testing /usr/bin/MagickWand-config... Doesn't exist
checking Testing /usr/sbin/bin/MagickWand-config... Doesn't exist
checking Testing /opt/bin/MagickWand-config... Doesn't exist
checking Testing /opt/local/bin/MagickWand-config... Doesn't exist
configure: error: not found. Please provide a path to MagickWand-config or Wand-config program.

解决办法：

yum install -y ImageMagick-devel

最后：

make && make install

vi /usr/local/etc/php/7.4/php.ini

# 在最后加入：
extension=imagick.so

# 查看是否OK：
/usr/local/opt/php@7.4/bin/php -m | grep imagick

重启php-fpm生效：

systemctl restart php-fpm@7.4