天天看点

关于PHP加速eAccelerator、APC和Zend Optimizer

安装哪一个呢?对性能会有什么影响呢?有时间要测试一下。

从别处看来的。

程序环境非必要Zend Optimizer的情况下,首选pecl-APC(它和Zend Optimizer不兼容)。

总结:

1.PHP缓冲(加速)首选pecl-APC,兼容性和性能表现都非常优秀。

2.如果你的PHP环境需要Zend Optimizer,就安装eAccelerator,并把Zend Optimizer的压缩级别调到0。

zend optimizer 是一个代码优化的模块,可以调优php代码,实现的原理是对那些在被最终执行之前由运行编译器(Run-Time Compiler)产生的代码进行优化。代码性能可以提高40%到100%,从这点上来说,应该不具有强大的缓存功能,没有读过源码,不清楚是否具有缓存 以及缓存质量如何。

eAccelerator 是一个将编译之后的php代码缓存在share memory中的模块。通过访问共享内存可以得到编译后的代码并直接执行用以提高效率,这个对于php的执行效率的提高还是很大的。同 时,eAccelerator也可以缓存数据至文件中,这个部分由于是对文件的操作,我想对大多数的文件cache来说,原理相似,性能相近。

APC 原理上来讲和eAccelerator相近,所以差别不大。不通过修改参数详细测试,不能看出两者的优劣。所以取其一即可。

三款免费的PHP加速器:APC、eAccelerator、XCache比较

一、PHP加速器介绍

        PHP加速器是一个为了提高PHP执行效率,从而缓存起PHP的操作码,这样PHP后面执行就不用解析转换了,可以直接调用PHP操作码,这样速度上就提高了不少。

        Apache中使用mod_php的请求、响应执行流程:

  1、Apache接收请求。

2、Apache传递请求给mod_php。

3、mod_php定位磁盘文件,并加载到内存中。

4、mod_php编译源代码成为opcode树。

5、mod_php执行opcode树。

       PHP加速器相应的就是第四步,它的目的就是防止PHP每次请求都重复编译PHP代码,因为在高访问量的网站上,大量的编译往往没有执行速度快呢?所以这 里面有个瓶颈就是PHP的重复编译既影响了速度又加载了服务器负载,为了解决此问题,PHP加速器就这样诞生了。

二、PHP加速器安装与配置

        1、安装配置APC

             APC全称是Alternative PHP Cache,官方翻译叫”可选PHP缓存”,它是PHP PECL中的一个扩展,好像是facebook在使用它,下面开始安装(ubuntu环境): 

$wget http://pecl.php.net/get/APC-3.0.19.tgz

$tar xvzf APC-3.0.19.tgz

$cd APC-3.0.19/APC-3.0.19

$/usr/local/php/bin/phpize

$./configure –enable-apc –enable-apc-mmap –with-php-config=/usr/local/php/bin/php-config

$make

$sudo make install

下面我们再配置APC,因为我的PECL扩展路径改变了,所以我得移动下编译好的文件:

$sudo mv /usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/apc.so /usr/local/php/lib/php/extensions/PECL

然后我们再编辑php.ini文件进行配置,请把下面的代码加入到php.ini中即可:

extension_dir = "/usr/local/php/lib/php/extensions/PECL"

extension = apc.so

; APC

apc.enabled = 1

apc.shm_segments = 1

apc.shm_size = 64

apc.optimization = 1

apc.num_files_hint = 0

apc.ttl = 0

apc.gc_ttl = 3600

apc.cache_by_default = on

     这样重启apache就会在phpinfo()信息中显示。

       2、安装配置eAccelerator

          eAccelerator的前身其实是truck-mmcache,因为开发truk-mmcache的人被Zend给招安了,所以开发 eAccelerator的人继承了truk-mmcache的一些特性,设计出eAccelerator加速器。安装如下:

$wget http://jaist.dl.sourceforge.net/sourceforge/eaccelerator/eaccelerator-0.9.5.tar.bz2

$tar -jxf eaccelerator-0.9.5.tar.bz2

$cd eaccelerator-0.9.5

$/usr/local/php/bin/phpize

$./configure –enable-eaccelerator=shared –with-php-config=/usr/local/php/bin/php-config

$make

$sudo make install

$sudo mv /usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/eaccelerator.so /usr/local/php/lib/php/extensions/PECL

将下面代码加入php.ini文件中

extension = eaccelerator.so

; eAccelerator

eaccelerator.shm_size = "16"

eaccelerator.cache_dir = "/tmp/eaccelerator"

eaccelerator.enable = "1"

eaccelerator.optimizer = "1"

eaccelerator.check_mtime = "1"

eaccelerator.debug = "0"

eaccelerator.filter = ""

eaccelerator.shm_max = "0"

eaccelerator.shm_ttl = "0"

eaccelerator.prune_period = "0"

eaccelerator.shm_only = "0"

eaccelerator.compress = "1"

eaccelerator.compress_level = "9"

创建缓存目录,重启apache

$sudo mkdir /tmp/eaccelerator

$sudo chmod 777 /tmp/eaccelerator

$sudo /usr/local/apache/apachectl restart

在phpinfo()检查是否安装成功.

3、安装配置XCache

XCache作为国人自己开发的东西,做小菜鸟的我也感到骄傲,而且XCache无论在速度还是性能上都做的不错。下面就赶紧让我们品尝它吧!

$wget http://xcache.lighttpd.net/pub/Releases/1.2.2/xcache-1.2.2.tar.gz

$tar xvzf xcache-1.2.2.tar.gz

$cd xcache-1.2.2

$/usr/local/php/bin/phpize

$./configure –enable-xcache –enable-xcache-coverager –with-php-config=/usr/local/php/php-config

$make

$sudo make install

$sudo mv /usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/xcache.so /usr/local/php/lib/php/extensions/PECL

在php.ini添加配置信息:

extension = xcache.so

; xcache

xcache.admin.user = "admin"

xcache.admin.pass = "(执行) echo ’(你的密码)’|md5sum(得出的密文)"

;

xcache.size = 24M

xcache.shm_scheme = "mmap"

xcache.count = 2

xcache.slots = 8k

xcache.ttl = 0

xcache.gc_interval = 0

xcache.var_size = 8M

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 = On

xcache.coveragedump_directory = ""

创建缓存目录,重启apache

$sudo mkdir /tmp/xcache

$sudo chmod 777 /tmp/xcache

$sudo /usr/local/apache/bin/apachectl restart

去查看phpinfo()信息吧!

三、PHP加速器测试

1、测试环境

硬件: AMD Athlon 64 X2 Dual Core Processor 4400+ @ 2.2GHz CPU, 2GB 内存. 160GB SATA 硬盘

软件: Linux Ubuntu server Gutsy 7.10, Apache 2.2.4, MySQL 5.0.45 和 PHP 5.2.3

测试指令: ab -c5 -n3000 http://example.com/ (我们使用的是Apache Benchmark (ab) 工具,并发连接为5,3000次请求)

2、测试结果

无任何加速器:

Document Path: /

Document Length: 21757 bytes

Concurrency Level: 5

Time taken for tests: 288.255212 seconds

Complete requests: 3000

Failed requests: 0

Write errors: 0

Total transferred: 66777000 bytes

HTML transferred: 65271000 bytes

Requests per second: 10.41 [#/sec] (mean)

Time per request: 480.425 [ms] (mean)

Time per request: 96.085 [ms] (mean, across all concurrent requests)

Transfer rate: 226.23 [Kbytes/sec] received

Connection Times (ms)

min mean[+/-sd] median max

Connect: 0 0 0.5 0 19

Processing: 181 479 186.0 444 1822

Waiting: 166 461 184.7 427 1708

Total: 181 479 186.0 444 1822

Percentage of the requests served within a certain time (ms)

50% 444

66% 525

75% 577

80% 619

90% 732

95% 819

98% 946

99% 1012

100% 1822 (longest request)

APC加速器:

Document Path: /

Document Length: 21757 bytes

Concurrency Level: 5

Time taken for tests: 98.530068 seconds

Complete requests: 3000

Failed requests: 0

Write errors: 0

Total transferred: 66777000 bytes

HTML transferred: 65271000 bytes

Requests per second: 30.45 [#/sec] (mean)

Time per request: 164.217 [ms] (mean)

Time per request: 32.843 [ms] (mean, across all concurrent requests)

Transfer rate: 661.84 [Kbytes/sec] received

Connection Times (ms)

min mean[+/-sd] median max

Connect: 0 0 0.0 0 2

Processing: 58 163 71.2 155 2452

Waiting: 53 158 69.6 150 2329

Total: 58 163 71.2 155 2452

Percentage of the requests served within a certain time (ms)

50% 155

66% 178

75% 193

80% 204

90% 235

95% 258

98% 285

99% 302

100% 2452 (longest request)

eAccelerator加速器:

Document Path: /

Document Length: 21757 bytes

Concurrency Level: 5

Time taken for tests: 95.983986 seconds

Complete requests: 3000

Failed requests: 0

Write errors: 0

Total transferred: 66777000 bytes

HTML transferred: 65271000 bytes

Requests per second: 31.26 [#/sec] (mean)

Time per request: 159.973 [ms] (mean)

Time per request: 31.995 [ms] (mean, across all concurrent requests)

Transfer rate: 679.39 [Kbytes/sec] received

Connection Times (ms)

min mean[+/-sd] median max

Connect: 0 0 0.1 0 3

Processing: 57 159 91.3 148 3830

Waiting: 50 152 89.8 142 3704

Total: 57 159 91.3 148 3830

Percentage of the requests served within a certain time (ms)

50% 148

66% 174

75% 193

80% 205

90% 239

95% 263

98% 289

99% 309

100% 3830 (longest request)

XCache加速器:

Document Path: /

Document Length: 21757 bytes

Concurrency Level: 5

Time taken for tests: 99.76300 seconds

Complete requests: 3000

Failed requests: 0

Write errors: 0

Total transferred: 66777000 bytes

HTML transferred: 65271000 bytes

Requests per second: 30.28 [#/sec] (mean)

Time per request: 165.127 [ms] (mean)

Time per request: 33.025 [ms] (mean, across all concurrent requests)

Transfer rate: 658.19 [Kbytes/sec] received

Connection Times (ms)

min mean[+/-sd] median max

Connect: 0 0 0.0 0 2

Processing: 59 164 83.4 155 3367

Waiting: 52 156 66.4 148 1802

Total: 59 164 83.4 155 3367

Percentage of the requests served within a certain time (ms)

50% 155

66% 178

75% 196

80% 206

90% 237

95% 263

98% 287

99% 305

100% 3367 (longest request)

3、结果摘要

请求时间(秒) 单次请求时间(毫秒) 最大内存占用(MB) 最小内存占用(MB)
None 10.41 96.08 24 24
APC 30.45 32.84 21 21
eAccelerator 31.26 31.99 23 18
XCache 30.28 33.02 29 19

四、PHP加速器比较结果总结

     1、通过测试得出eAccelerator在请求时间和内存占用综合方面是最好的。

     2、通过测试得出使用加速器比无加速器在请求时间快了3倍左右。

     3、通过各个官方观察,XCache是更新最快的,这也说明最有发展的。

        以上是总结结果,你也许会问我到底用那个加速器好呢?我只能告诉你,首先,用一定比不用好,其次每个加速器还有一些可以调优的参数,所以要根据你的系统环 境而定,然后,我个人觉得你可以详细研究下eAccelerator和XCache,这两款潜力还是很大的,最后我从比较专业的测试网站搞了一张结果图:

关于PHP加速eAccelerator、APC和Zend Optimizer

本文转载自:http://killker.com/blog/?p=94

原文链接地址:http://www.vpser.net/opt/apc-eaccelerator-xcache.html