# wget http://mysqltuner.pl/ -O mysqltuner.pl
# perl mysqltuner.pl --forcemem 8000000000 --forceswap 8000000000 --defaults-file /root/.my.cnf --defaults-extra-file /etc/mysql/conf.d_23357/my.cnf --port 23357
 >>  MySQLTuner 2.5.3
	 * Jean-Marie Renouard <jmrenouard@gmail.com>
	 * Major Hayden <major@mhtx.net>
 >>  Bug reports, feature requests, and downloads at http://mysqltuner.pl/
 >>  Run with '--help' for additional options and output filtering

[--] Skipped version check for MySQLTuner script
mysql: [ERROR] unknown option '--print-defaults'
mysql: [ERROR] unknown option '--print-defaults'
[--] Assuming 8000000000 MB of physical memory
[--] Assuming 8000000000 MB of swap space
[!!] Failed to execute: SELECT VERSION()
[!!] FAIL Execute SQL / return code: 1792
[!!] You probably do not have enough privileges to run MySQLTuner ...