Edit MySQL config: 
```
sudo rvim /etc/mysql/my.cnf
```

80% RAM to innodb_buffer_pool_size -> https://www.percona.com/blog/2015/06/02/80-ram-tune-innodb_buffer_pool_size/

Search for XMLRPC POST logs
``` 
grep xmlrpc.php /var/log/apache2/access.log
```

find / -xdev -type f -print0 | xargs -0 grep -H "ini_set('memory_limit'"

GET memory usage -> http://php.net/manual/en/function.memory-get-usage.php
PHP memory limit -> http://stackoverflow.com/questions/10738990/ini-set-ini-get-memory-limit-restoring-memory-php

SET PHP memory limit Wordpress
http://ideaboxthemes.com/increase-php-memory-limit-wordpress/
sudo rvim /etc/php5/apache2/php.ini
memory_limit = 128M 
memory_limit = -1 (unlimited)