RAM cache

基本解释

The problem with this approach is that you are actually reducing your available RAM cache, not increasing it.
这种方式的问题是如果这么做反而会减少可用的 RAM 缓存，而不是增加。
Memcached is an RAM cache for storing and handling data (which uses libevent at it's core, as well as being used with other libevent servers).
Memcached 是用于存储和处理数据的 RAM 缓存（其核心使用 libevent，也可以使用其他 libevent 服务器）。
If you have multiple machines, the temptation is to set up a memcached instance on all of your spare machines to provide a massive amount of networked RAM cache storage.
如果有多台机器，那么很自然地会想要在所有多余机器上设置一个 memcached 的实例来提供一个超大的联网 RAM 缓存存储。

There is no Level 3 cache, RAM maxes out at 640 MB and there is no support for ADC or DVI monitors.
FORBES: Magazine Article