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InnoDB maintains a storage area called thebuffer pool for caching data and indexes in memory. Knowing how theInnoDB 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 theInnoDB buffer pool, an overview of its LRU replacement algorithm, and general configuration information, seeSection 17.5.1, “Buffer Pool”.

For additionalInnoDB buffer pool configuration and tuning information, see these sections: