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

unique_key_bitmap_cache_policy

UNIQUE KEY delete-bitmap cache policy name (SLRU or LRU).

unique_key_bitmap_cache_size_bytes

Maximum size in bytes of the in-process cache for UNIQUE KEY per-part delete bitmaps. Set to 0 to disable the cache.

unique_key_bitmap_cache_size_ratio

The size of the protected queue (in case of SLRU policy) in the UNIQUE KEY delete-bitmap cache relative to the cache’s total size.

unique_key_index_cache_policy

UNIQUE KEY index cache policy name (SLRU or LRU).

unique_key_index_cache_size_bytes

Maximum size (bytes) of the in-process cache for UNIQUE KEY index (SST) blocks. Set to 0 to disable the cache.

unique_key_index_cache_size_ratio

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