# Memory Usage in IDOL Server

See Also: Disk Usage in IDOL

IDOL Server uses a variety of data structures held in RAM to optimize the performance of both indexing and querying. The following sections provide more information about these data structures. You can individually configure the memory usage of each of the data structures, according to your needs, but it is important to understand the impact of such changes.

- IDOL Internal Storage and Indexes. Information on the data structures and the index directories that IDOL Server uses.

- Repository Storage Mode. Describes the way that IDOL stores content, and how this affects disk usage, and indexing and query performance.

- Reduce Memory Usage. Details of how to reduce and optimize the memory usage of different structures.

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