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These settings configure the ClickHouse server and are autogenerated from ClickHouse source.

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uncompressed_cache_policy

Uncompressed cache policy name.

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uncompressed_cache_size

Maximum size (in bytes) for uncompressed data used by table engines from the MergeTree family. There is one shared cache for the server. Memory is allocated on demand. The cache is used if the option use_uncompressed_cache is enabled. The uncompressed cache is advantageous for very short queries in individual cases.
A value of 0 means disabled.This setting can be modified at runtime and will take effect immediately.

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uncompressed_cache_size_ratio

The size of the protected queue (in case of SLRU policy) in the uncompressed cache relative to the cache’s total size.
Last modified on July 23, 2026