Memcache vs Java Memory

Question

Simple, probably dumb question: Suppose I have a Java server that stores in memory commonly used keys and values which I can query (let\'s say in a HashMap)

What\'s the

Answer 1

I just made a benchmark between a concurrent hash map, memcached, and MySQL.

Here are the results:

Type Insert Lookup Remove

ConcurrentHashMap 264ms 93ms 82ms

Memcached 6549ms 5976ms 4900ms

Mysql 55754ms 26002ms 57899ms

A thread pool was used for this benchmark.

Some more information can be found here: http://www.incentergy.de/2013/12/big-data-architecture-patterns-for-performance/

Further the following cache might be an alternative to memcached: https://code.google.com/p/kitty-cache/