HowTo: Flush Contents Of a Memcached Server Using Command Line

echo 'flush_all' | nc localhost 11211

sudo service apache2 reload && sudo service apache2 restart && sudo service mysql reload && sudo service mysql restart

sudo service apache2 reload && sudo service apache2 restart && sudo service mysql reload && sudo service mysql restart && sudo service memcached restart

Truncate logs

truncate logfile --size 0

For the entire file system:
find / -type f -name "*.log" -exec truncate --size 0 {} +

Mysql

SET GLOBAL slow_launch_time = 1;
SET GLOBAL slow_query_log = 'ON';
SET GLOBAL log_queries_not_using_indexes = 'ON';
SET GLOBAL slow_query_log_file ='/var/lib/mysql/slow-query-log.log';
SET GLOBAL long_query_time = 1;
SHOW VARIABLES LIKE '%slow%';

#FLUSH LOGS;


SHOW GLOBAL STATUS LIKE 'Connections';
SHOW GLOBAL STATUS LIKE 'Threads_created';
SHOW GLOBAL STATUS LIKE 'Max_used_connections';

#Threads_created / Connections > 0.01
#increase thread_cache_size where thread_cache_size > Max_used_connections