Joomla + APC + memcached

APC makes good cache.

configurations

http://php.net/manual/en/apc.configuration.php 


apc.enabled=1                       # default = 1
apc.shm_segments=1                  # default = 1
apc.shm_size=128                    # default = 30
apc.ttl=7200                        # default = 0
apc.user_ttl=7200                   # default = 0
apc.num_files_hint=1024             # default = 1000
apc.mmap_file_mask=/tmp/apc.XXXXXX  # default = no value
apc.enable_cli=1                    # default = 0



and
apc.shm_size=256

apc.num_files_hint=10000
apc.user_entries_hint=10000
apc.max_file_size=5M
apc.stat=0


dont forget there is apc.php file that shows apc stats.


Memcached

to install memcached

http://dag.wieers.com/rpm/FAQ.php#B2

get dag wieers yum repo, then enable
You need to edit the file /etc/yum.repos.d/rpmforge.repo and put "enabled = 1" instead of "enabled = 0" in the [rpmforge-extras] section and then re-run your command yum -y install memcached.


then install as 


yum install memcached php-memcache

and then 

pecl install memcache

if fails make sure install 
gcc
using 

yum install gcc

then add extension=memcache.so to php.ini

thats it. dont forget to restart httpd and memcached also chkconfig memcached to start on boot


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