OK. You're right. MySQL seems using InnoDB buffer pool. I found the mention. > You do not need to manually load data into memcached at startup. As particular k

OK. You're right. MySQL seems using InnoDB buffer pool. I found the mention. > You do not need to manually load data into memcached at startup. As particular keys are requested by an application, the values are retrieved from the database automatically, and cached in memory using the InnoDB buffer pool. So memory-cache is provided the engine itself, not by external plugin.