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apc,xcache,eaccelerator都能够缓存opcode的php中间码，从而起到对php加速的作用，以前写过一篇关于eaccelerator的文章，请参考http://blog.51yip.com/php/172.html?? apc,eaccelerator安装方法都一样，不同的是参数设置不一样而已
一，apc安装配置
wget http://pecl.php.net/get/APC-3.1.2.tgz
tar zxvf APC-3.1.2.tgz
cd APC-3.1.2/
/usr/local/php/bin/phpize
./configure --enable-apc --enable-apc-mmap --with-php-config=/usr/local/php/bin/php-config
make
make install
修改php.ini
查找extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/"
下面添加 extension = "apc.so" 配置php.ini 末尾加入
apc.enabled = 1
apc.cache_by_default = on
apc.shm_segments = 1
apc.shm_size = 32
apc.ttl = 600
apc.user_ttl = 600
apc.num_files_hint = 0
apc.write_lock = On
二，xcache安装配置
wget http://xcache.lighttpd.net/pub/Releases/1.2.2/xcache-1.2.2.tar.gz
tar zxvf xcache-1.2.2.tar.gz
cd xcache
/usr/local/php/bin/phpize
./configure --enable-xcache --enable-xcache-mmap --with-php-config=/usr/local/php/bin/php-config
make
make install
修改php.ini
查找extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/"
下面添加 extension = "xcache.so" 配置php.ini 末尾加入
[xcache-common]
;; install as zend extension (recommended),normally "$extension_dir/xcache.so"
;; or install as extension,make sure your extension_dir setting is correct
; extension = xcache.so
[xcache.admin]
xcache.admin.auth = On
xcache.admin.user = "mOo"
; xcache.admin.pass = md5($your_password)
xcache.admin.pass = ""
[xcache]
xcache.shm_scheme =????????"mmap"
xcache.size??=?????????????? 32M
xcache.count =???????????????? 1
xcache.slots =????????????????8K
xcache.ttl?? =??????????????3600
xcache.gc_interval =???????? 300
; Same as aboves but for variable cache
; If you don't know for sure that you need this,you probably don't
xcache.var_size??=????????????0M
xcache.var_count =???????????? 1
xcache.var_slots =????????????8K
xcache.var_ttl?? =???????????? 0
xcache.var_maxttl?? =??????????0
xcache.var_gc_interval =???? 300
; N/A for /dev/zero
xcache.readonly_protection = Off
xcache.mmap_path =????"/dev/zero"
xcache.cacher =?????????????? On
xcache.stat?? =?????????????? On
这三个加速都对opcode的php中间码对行缓存的，能不能同时使用，没有尝试过，不过eacc和apc，我同时使用过，不过有问题。网上有关于这三者加速的比较，查一下好多，有了就省得我来比较了。写的挺不错的。自己搜一下吧。 （编辑：李大同）
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