InnoDB maintains a storage area
called the buffer pool
for caching data and indexes in memory. Knowing how the
InnoDB buffer pool works, and taking
advantage of it to keep frequently accessed data in memory, is
an important aspect of MySQL tuning.
For an explanation of the inner workings of the
InnoDB buffer pool, an overview of its LRU
replacement algorithm, and general configuration information,
see Section 14.8.1, “Buffer Pool”.
InnoDB buffer pool
configuration and tuning information, see these sections: