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XCache 是一个又快又稳定的 PHP opcode 缓存器. 经过良好的测试并在大流量 / 高负载的生产机器上稳定运行. 经过 (在 linux 上) 测试并支持所有现行 PHP 分支的最新发布版本, 如 PHP_5_1 PHP_5_2 PHP_5_3 PHP_5_4. 并完美支持线程安全 /Windows. 与同类 opcode 缓存器相比更胜一筹, 比如能够快速跟进 PHP 版本.
LAMP 平台安装 Xcache 和 Memcached 加速网站运行 http://www.linuxidc.com/Linux/2015-06/118835.htm
LAMP 之 AMP 分离 +XCache 加速 http://www.linuxidc.com/Linux/2015-06/118834.htm
LAMP+Xcache 环境搭建 http://www.linuxidc.com/Linux/2014-05/101087.htm
我的 php 为 5.6.6 版本，所以需要安装 xcache3.2.0
官网下载：http://xcache.lighttpd.net/
tar zxvf xcache-3.2.0.tar.gz
cd xcache-3.2.0
/usr/local/php/bin/phpize
./configure –enable-xcache –with-php-config=/usr/local/php/bin/php-config
# make install
Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20131226/
安装完成后会在上面的路径下生成 xcache.so 文件；
php.ini 文件加入 xcache 代码段（原文件为 /usr/local/src/xcache-3.2.0/xcache.ini）
# vi /usr/local/php/etc/php.ini
[xcache-common]
extension = xcache.so
[xcache.admin]
xcache.admin.enable_auth = On
xcache.admin.user = “xcache”
xcache.admin.pass = “”
[xcache]
xcache.shm_scheme =”mmap”
xcache.size=60M
xcache.count =1
xcache.slots =8K
xcache.ttl=0
xcache.gc_interval =0
xcache.var_size=4M
xcache.var_count =1
xcache.var_slots =8K
xcache.var_ttl=0
xcache.var_maxttl=0
xcache.var_gc_interval =300
xcache.test =Off
xcache.readonly_protection = On
xcache.mmap_path =”/tmp/xcache”
xcache.coredump_directory =””
xcache.cacher =On
xcache.stat=On
xcache.optimizer =Off
[xcache.coverager]
xcache.coverager =On
xcache.coveragedump_directory =””
保存退出后，重启 apache，php -v 查看是否有 xcache 信息；
# /usr/local/php/bin/php -v
PHP 5.6.6 (cli) (built: Jun 29 2015 17:23:08)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
with XCache v3.2.0, Copyright (c) 2005-2014, by mOo
with XCache Cacher v3.2.0, Copyright (c) 2005-2014, by mOo
或 phpinfo.php 浏览器中查看；
xcache 状态查询：
创建一个缓存文件：touch /tmp/xcache
拷贝 xcache3.2.0 目录下 htdocs 目录到你自己的网站目录下，自定义目录名为 xcache；
# cp -r htdocs/ /data/www/blog/xcache/
生成 md5 密码，复制密码拷贝到刚才 php.ini 文件 xcache.admin.pass=”” 引号中。
# echo -n ‘123456’ |md5sum
e10adc3949ba59abbe56e057f20f883e
在浏览器访问 www.star.com/xcache/，弹出认证框输入用户名和密码访问；
更多详情见请继续阅读下一页的精彩内容：http://www.linuxidc.com/Linux/2015-08/122108p2.htm
ab 压力测试进行对比：未安装 xcache 与安装 xcache
使用 DELL R420 真机(使用 discuz 论坛首页测试)
在另一台机器上，使用 ab 压力测试；未安装 xcache，3000 次并发为 118；3 万次并发为 74-94 之间；
[root@localhost ~]# ab -n 3000 -c 100 www.linuxidc.com/forum.php
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Server Software: Apache
Server Hostname: www.linuxidc.com
Server Port: 80
Document Path: /forum.php
Document Length: 13222 bytes
Concurrency Level: 100
Time taken for tests: 25.247 seconds
Complete requests: 3000
Failed requests: 0
Write errors: 0
Total transferred: 42018000 bytes
HTML transferred: 39666000 bytes
Requests per second: 118.82 [#/sec] (mean) #每秒处理的请求数
Time per request: 841.579 [ms] (mean)
Time per request: 8.416 [ms] (mean, across all concurrent requests)
Transfer rate: 1625.25 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 1 4 9.0 2 85
Processing: 66 827 441.1 967 2003
Waiting: 55 812 437.8 953 1992
Total: 68 831 442.2 970 2031
Percentage of the requests served within a certain time (ms)
50% 970
66% 1085
75% 1147
80% 1187
90% 1295
95% 1411
98% 1680
99% 1791
100% 2031 (longest request)
可以查看日志记录也是 3000 条
[root@localhost logs]# cat linuxidc.com-access_log_20150820.log|wc -l
3000
请求为 3 万次，测试结果如下：
[root@localhost ~]# ab -n 30000 -c 100 www.linuxidc.com/forum.php
Server Software: Apache
Server Hostname: www.linuxidc.com
Server Port: 80
Document Path: /forum.php
Document Length: 13222 bytes
Concurrency Level: 100
Time taken for tests: 402.065 seconds
Complete requests: 30000
Failed requests: 2
(Connect: 0, Receive: 0, Length: 2, Exceptions: 0)
Write errors: 0
Total transferred: 420614188 bytes
HTML transferred: 397069884 bytes
Requests per second: 74.61 [#/sec] (mean)
Time per request: 1340.216 [ms] (mean)
Time per request: 13.402 [ms] (mean, across all concurrent requests)
Transfer rate: 1021.62 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 1 170 639.2 4 7553
Processing: 60 1161 1108.3 1037 9234
Waiting: 54 911 534.1 975 7633
Total: 63 1331 1406.5 1068 12650
Percentage of the requests served within a certain time (ms)
50% 1068
66% 1208
75% 1323
80% 1482
90% 2672
95% 4181
98% 6083
99% 7630
100% 12650 (longest request)
系统负载，最高达到 88
开启 xcache 缓存后，3000 次请求并发为 368；3 万次请求并发为 103；系统负载最高只有 2 -4；
[root@localhost ~]# ab -n 3000 -c 100 http://www.linuxidc.com/forum.php
Server Software: Apache
Server Hostname: www.linuxidc.com
Server Port: 80
Document Path: /forum.php
Document Length: 12579 bytes
Concurrency Level: 100
Time taken for tests: 8.132 seconds
Complete requests: 3000
Failed requests: 8
(Connect: 0, Receive: 0, Length: 8, Exceptions: 0)
Total transferred: 39787499 bytes
HTML transferred: 37732203 bytes
Requests per second: 368.90 [#/sec] (mean)
Time per request: 271.079 [ms] (mean)
Time per request: 2.711 [ms] (mean, across all concurrent requests)
Transfer rate: 4777.81 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 1 36 29.8 27 141
Processing: 27 230 112.0 222 919
Waiting: 17 196 104.1 178 864
Total: 31 266 107.4 252 951
Percentage of the requests served within a certain time (ms)
50% 252
66% 298
75% 333
80% 352
90% 398
95% 452
98% 518
99% 592
100% 951 (longest request)
请求为 3 万次，测试结果如下：
[root@localhost ~]# ab -n 30000 -c 100 http://www.linuxidc.com/forum.php
Server Software: Apache
Server Hostname: www.linuxidc.com
Server Port: 80
Document Path: /forum.php
Document Length: 13233 bytes
Concurrency Level: 100
Time taken for tests: 290.761 seconds
Complete requests: 30000
Failed requests: 29963
(Connect: 0, Receive: 0, Length: 29963, Exceptions: 0)
Total transferred: 397977862 bytes
HTML transferred: 377424199 bytes
Requests per second: 103.18 [#/sec] (mean)
Time per request: 969.202 [ms] (mean)
Time per request: 9.692 [ms] (mean, across all concurrent requests)
Transfer rate: 1336.67 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 1 273 830.2 7 5700
Processing: 18 693 1404.2 249 7851
Waiting: 14 366 547.2 212 5480
Total: 19 967 2080.8 276 12416
Percentage of the requests served within a certain time (ms)
50% 276
66% 382
75% 480
80% 567
90% 2453
95% 6768
98% 9107
99% 9879
100% 12416 (longest request)
每次 ab 压力测试的结果都不太准确，在虚拟机测试结果更不靠谱。特意找的真机测试，除了负载较高，内存使用竟然没太大变化；只能做参考用；
本文永久更新链接地址：http://www.linuxidc.com/Linux/2015-08/122108.htm
XCache 是一个又快又稳定的 PHP opcode 缓存器. 经过良好的测试并在大流量 / 高负载的生产机器上稳定运行. 经过 (在 linux 上) 测试并支持所有现行 PHP 分支的最新发布版本, 如 PHP_5_1 PHP_5_2 PHP_5_3 PHP_5_4. 并完美支持线程安全 /Windows. 与同类 opcode 缓存器相比更胜一筹, 比如能够快速跟进 PHP 版本.
LAMP 平台安装 Xcache 和 Memcached 加速网站运行 http://www.linuxidc.com/Linux/2015-06/118835.htm
LAMP 之 AMP 分离 +XCache 加速 http://www.linuxidc.com/Linux/2015-06/118834.htm
LAMP+Xcache 环境搭建 http://www.linuxidc.com/Linux/2014-05/101087.htm
我的 php 为 5.6.6 版本，所以需要安装 xcache3.2.0
官网下载：http://xcache.lighttpd.net/
tar zxvf xcache-3.2.0.tar.gz
cd xcache-3.2.0
/usr/local/php/bin/phpize
./configure –enable-xcache –with-php-config=/usr/local/php/bin/php-config
# make install
Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20131226/
安装完成后会在上面的路径下生成 xcache.so 文件；
php.ini 文件加入 xcache 代码段（原文件为 /usr/local/src/xcache-3.2.0/xcache.ini）
# vi /usr/local/php/etc/php.ini
[xcache-common]
extension = xcache.so
[xcache.admin]
xcache.admin.enable_auth = On
xcache.admin.user = “xcache”
xcache.admin.pass = “”
[xcache]
xcache.shm_scheme =”mmap”
xcache.size=60M
xcache.count =1
xcache.slots =8K
xcache.ttl=0
xcache.gc_interval =0
xcache.var_size=4M
xcache.var_count =1
xcache.var_slots =8K
xcache.var_ttl=0
xcache.var_maxttl=0
xcache.var_gc_interval =300
xcache.test =Off
xcache.readonly_protection = On
xcache.mmap_path =”/tmp/xcache”
xcache.coredump_directory =””
xcache.cacher =On
xcache.stat=On
xcache.optimizer =Off
[xcache.coverager]
xcache.coverager =On
xcache.coveragedump_directory =””
保存退出后，重启 apache，php -v 查看是否有 xcache 信息；
# /usr/local/php/bin/php -v
PHP 5.6.6 (cli) (built: Jun 29 2015 17:23:08)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
with XCache v3.2.0, Copyright (c) 2005-2014, by mOo
with XCache Cacher v3.2.0, Copyright (c) 2005-2014, by mOo
或 phpinfo.php 浏览器中查看；
xcache 状态查询：
创建一个缓存文件：touch /tmp/xcache
拷贝 xcache3.2.0 目录下 htdocs 目录到你自己的网站目录下，自定义目录名为 xcache；
# cp -r htdocs/ /data/www/blog/xcache/
生成 md5 密码，复制密码拷贝到刚才 php.ini 文件 xcache.admin.pass=”” 引号中。
# echo -n ‘123456’ |md5sum
e10adc3949ba59abbe56e057f20f883e
在浏览器访问 www.star.com/xcache/，弹出认证框输入用户名和密码访问；
更多详情见请继续阅读下一页的精彩内容：http://www.linuxidc.com/Linux/2015-08/122108p2.htm
