Fix errors listed in ISPConfig 3 log file

Uninstall Xcache and solving error Failed loading cannot open shared object file: No such file or directory
When you got this
   
"Failed loading /usr/lib/php5/20090626/xcache.so:  /usr/lib/php5/20090626/xcache.so: cannot open shared object file: No such file or directory"

This because you not removing xcache configuration from php.In this example, i using php5-fpm. If you’re using apache2 + php5, so you can find it on /etc/php5/apache2/

How to solve this problem:
   
1. Removing extension="xcache.so" from /etc/php5/fpm/php.ini
   
2. Delete file xcache.ini from folder /etc/php5/fpm/conf.d/

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PHP Warning: PHP Startup: apc.shm_size now uses M/G suffixes, please update your ini files in Unknown on line 0

Edit apc.ini
sudo nano /etc/php5/fpm/conf.d/apc.ini

Change
apc.shm_size="256"
to
apc.shm_size="256M"

Restart MySQL, httpd  service

service mysql stop && sleep 1 && service mysql start && sleep 1 && service httpd graceful
or
service mysql stop && sleep 1 && service mysql start
/etc/init.d/apache2 restart