I need to reduce the value of "write per second" and "read per second" on MySQL (this is for statistics: total views of post).
Can Memcached doing this job?
Memcache cannot control traffic. What you can do is MySQL cluster with load balancer.
Memcache is accelerator for MySQL with key-value store
Memcached doesn't have any such controls. You probably need some form of proxy server to sit in between your program calling MySQL and MySQL server itself. Check out MySQL Proxy:
Lua is a pretty straight forward language and you can probably implement exactly what you're looking for.