RedHat Enterprise 6.5環境下使用eAccelerator優化網站性能
第一步：在做優化之前，首先對網站伺服器的硬體做一下檢測
1，記憶體資訊：2G記憶體，swap容量為4G
[root@linuxcast ~]# free -m
total used free shared buffers cached
Mem: 1870 1228 642 0 47 435
-/+ buffers/cache: 744 1125
Swap: 4095 0 4095
2，cpu資訊，也可以通過cat /proc/cpuinfo檢視
[root@linuxcast ~]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 1
On-line CPU(s) list: 0
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 58
Stepping: 9
CPU MHz: 3569.819
BogoMIPS: 7139.63
Hypervisor vendor: VMware
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 8192K
NUMA node0 CPU(s): 0
[root@linuxcast ~]#
3，檢視磁盤的續寫性能：讀取速度為：2544MB，吸入速度為847MB
[root@linuxcast ~]# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 2544 MB in 3.00 seconds = 847.63 MB/sec
[root@linuxcast ~]#
4，對網站首頁進行壓力測試：ab指令
對指定網頁進行10次并發，1000次請求進行壓力測試：傳回的結果是10.13
也就是說一天24小時可以承受的請求數量為：10*60*60*24=86400
[root@linuxcast ~]# ab -c 10 -n 1000 http://www.linuxcast.net/index.php
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking www.linuxcast.net (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests
Server Software: Apache/2.2.15
Server Hostname: www.linuxcast.net
Server Port: 80
Document Path: /index.php
Document Length: 0 bytes
Concurrency Level: 10
Time taken for tests: 98.761 seconds
Complete requests: 1000
Failed requests: 0
Write errors: 0
Non-2xx responses: 1000
Total transferred: 293000 bytes
HTML transferred: 0 bytes
Requests per second: 9.23 [#/sec] (mean)
Time per request: 987.614 [ms] (mean)
Time per request: 98.761 [ms] (mean, across all concurrent requests)
Transfer rate: 2.90 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 2.0 0 32
Processing: 355 986 49.7 985 1625
Waiting: 355 983 48.8 982 1605
Total: 355 986 49.7 985 1625
Percentage of the requests served within a certain time (ms)
50% 985
66% 997
75% 1004
80% 1010
90% 1032
95% 1050
98% 1076
99% 1097
100% 1625 (longest request)
第二步：安裝eAccelerator，提升網站性能
1，安裝Development Tool工具
yum groupinstall -y "Development Tools"
2，安裝php-devel
注：可以在pkgs.org上下載下傳相關的版本（必須和php版本相同）
[root@linuxcast ~]# rpm -qa | grep php
php-pdo-5.3.3-26.el6.x86_64
php-gd-5.3.3-26.el6.x86_64
php-5.3.3-26.el6.x86_64
php-common-5.3.3-26.el6.x86_64
php-devel-5.3.3-26.el6.x86_64
php-mysql-5.3.3-26.el6.x86_64
php-xml-5.3.3-26.el6.x86_64
php-cli-5.3.3-26.el6.x86_64
php-pear-1.9.4-4.el6.noarch
[root@linuxcast ~]# cd
[root@linuxcast ~]# wget http://mirror.centos.org/centos/6/os/x86_64/Packages/php-devel-5.3.3-26.el6.x86_64.rpm
--2014-08-08 14:11:48-- http://mirror.centos.org/centos/6/os/x86_64/Packages/php-devel-5.3.3-26.el6.x86_64.rpm
[root@linuxcast ~]# rpm -ivh php-devel-5.3.3-26.el6.x86_64.rpm
3，下載下傳并安裝eAccelerator
[root@linuxcast ~]# cd /usr/local/
下載下傳eAccelerator并命名為master.zip：
[root@linuxcast local]# wget https://github.com/eaccelerator/eaccelerator/zipball/master -O master.zip
[root@linuxcast local]# unzip master.zip
重命名解壓縮出來的檔案夾為eAccelerator：
[root@linuxcast local]# mv eaccelerator-eaccelerator-42067ac/ eaccelerator
[root@linuxcast local]# cd eaccelerator/
[root@linuxcast eaccelerator]# ls
AUTHORS config.w32 debug.c eaccelerator.h ea_dasm.h ea_restore.h fnmatch.h mm.h optimize.c win32
bugreport.php control.php debug.h eaccelerator.ini ea_info.c ea_store.c Makefile.frag NEWS PHP_Highlight.php
ChangeLog COPYING doc eaccelerator_version.h ea_info.h ea_store.h Makefile.in opcodes.c README
config.m4 dasm.php eaccelerator.c ea_dasm.c ea_restore.c fnmatch.c mm.c opcodes.h README.win32
[root@linuxcast eaccelerator]# ls configure
ls: cannot access configure: No such file or directory
在eAccelerator目錄中執行phpize指令，生成configure檔案：
[root@linuxcast eaccelerator]# phpize
Configuring for:
PHP Api Version: 20090626
Zend Module Api No: 20090626
Zend Extension Api No: 220090626
configure
安裝eAccelerator：
[root@linuxcast eaccelerator]# ./configure
[root@linuxcast eaccelerator]# make && make install
第三步：編輯eAccelerator的配置檔案：
在/etc/php.d目錄下建立eacceleractor.ini
内容參照：https://github.com/eaccelerator/eaccelerator網頁上的
To install as PHP extension:
eAccelerator.ini檔案内容：
extension="eaccelerator.so"
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_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
建立eAccelerator虛拟目錄：
mkdir /tmp/eaccelerator
設定eAccelerator目錄的權限：
chmod 0777 /tmp/eaccelerator
注：配置完成之後需要重新啟動httpd服務
service httpd restart
第四步：安裝好eAccelerator之後，再次對網站首頁進行壓力測試：
測試結果：
[root@linuxcast php.d]# ab -c 10 -n 1000 http://www.linuxcast.net/index.php
Time taken for tests: 41.735 seconds
Requests per second: 23.96 [#/sec] (mean)
Time per request: 417.353 [ms] (mean)
Time per request: 41.735 [ms] (mean, across all concurrent requests)
Transfer rate: 6.86 [Kbytes/sec] received
Connect: 0 0 0.6 0 10
Processing: 179 417 21.9 416 480
Waiting: 178 415 21.7 415 480
Total: 179 417 21.9 416 480
50% 416
66% 423
75% 429
80% 432
90% 440
95% 450
98% 461
99% 466
100% 480 (longest request)
[root@linuxcast php.d]#
可以看到優化後的傳回結果為：Requests per second: 23.96 [#/sec] (mean)
也就是說，是優化之前的三倍。
php的加速器除了eAccelerator之外還有xcache、APC（Alternative PHP Cache）等...
本文轉自 murongqingqqq 51CTO部落格，原文連結:http://blog.51cto.com/murongqingqqq/1537477
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