## 15.4 InnoDB Architecture

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 The following diagram shows in-memory and on-disk structures that comprise the `InnoDB` storage engine architecture. For information about each structure, see [Section 15.5, “InnoDB In-Memory Structures”](innodb-in-memory-structures.html), and [Section 15.6, “InnoDB On-Disk Structures”](innodb-on-disk-structures.html).

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**Figure 15.1 InnoDB Architecture**

<img alt="InnoDB architecture diagram showing in-memory and on-disk structures. In-memory structures include the buffer pool, adaptive hash index, change buffer, and log buffer. On-disk structures include tablespaces, redo logs, and doublewrite buffer files." src="images/innodb-architecture.png" height="545" width="700" />

