由于某种原因，我的php安装拒绝加载APC Op-Cache的配置。但是看看phpinfo（）这个目录中的每个其他配置文件都会被加载。权限似乎没问题。下面是目录和配置文件本身。我可以确认apcu.so应该存在于extensions目录中。这里有什么想法？我很难过。
root@friends:/etc/php5/fpm/conf.d# ls -l
total 24
lrwxrwxrwx 1 root root 32 Apr 7 2014 05-opcache.ini -> ../../mods-available/opcache.ini
lrwxrwxrwx 1 root root 28 Apr 7 2014 10-pdo.ini -> ../../mods-available/pdo.ini
lrwxrwxrwx 1 root root 29 Aug 6 13:45 20-apcu.ini -> ../../mods-available/apcu.ini
lrwxrwxrwx 1 root root 29 Apr 9 2014 20-curl.ini -> ../../mods-available/curl.ini
lrwxrwxrwx 1 root root 27 Aug 6 2014 20-gd.ini -> ../../mods-available/gd.ini
lrwxrwxrwx 1 root root 29 Apr 8 2014 20-json.ini -> ../../mods-available/json.ini
lrwxrwxrwx 1 root root 31 Aug 6 2014 20-mcrypt.ini -> ../../mods-available/mcrypt.ini
lrwxrwxrwx 1 root root 34 Feb 2 2015 20-memcached.ini -> ../../mods-available/memcached.ini
lrwxrwxrwx 1 root root 30 Aug 6 2014 20-mssql.ini -> ../../mods-available/mssql.ini
lrwxrwxrwx 1 root root 31 Apr 7 2014 20-mysqli.ini -> ../../mods-available/mysqli.ini
lrwxrwxrwx 1 root root 30 Apr 7 2014 20-mysql.ini -> ../../mods-available/mysql.ini
lrwxrwxrwx 1 root root 34 Aug 6 2014 20-pdo_dblib.ini -> ../../mods-available/pdo_dblib.ini
lrwxrwxrwx 1 root root 34 Apr 7 2014 20-pdo_mysql.ini -> ../../mods-available/pdo_mysql.ini
lrwxrwxrwx 1 root root 33 Apr 7 2014 20-readline.ini -> ../../mods-available/readline.ini
-rw-r--r-- 1 root root 22661 Apr 22 15:11 newrelic.ini
root@friends:/etc/php5/fpm/conf.d# ls -l ../../mods-available/
total 56
-rw-r--r-- 1 root root 119 Aug 6 13:47 apcu.ini
-rw-r--r-- 1 root root 68 Apr 3 2014 curl.ini
-rw-r--r-- 1 root root 64 Jul 7 2014 gd.ini
-rw-r--r-- 1 root root 68 Aug 8 2013 json.ini
-rw-r--r-- 1 root root 58 Aug 6 2014 mcrypt.ini
-rw-r--r-- 1 root root 70 Dec 19 2012 memcached.ini
-rw-r--r-- 1 root root 71 Jul 7 2014 mssql.ini
-rw-r--r-- 1 root root 71 Apr 3 2014 mysqli.ini
-rw-r--r-- 1 root root 70 Apr 3 2014 mysql.ini
-rw-r--r-- 1 root root 83 May 2 2014 opcache.ini
-rw-r--r-- 1 root root 75 Jul 7 2014 pdo_dblib.ini
-rw-r--r-- 1 root root 66 Apr 3 2014 pdo.ini
-rw-r--r-- 1 root root 74 Apr 3 2014 pdo_mysql.ini
-rw-r--r-- 1 root root 76 Apr 3 2014 readline.ini
root@friends:/etc/php5/fpm/conf.d# cat ../../mods-available/apcu.ini
extension=apcu.so
apc.enabled=1
apc.shm_size=128M
apc.ttl=3600
apc.user_ttl=7200
apc.gc_ttl=3600
apc.max_file_size=1M