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These settings are available in system.merge_tree_settings and are autogenerated from ClickHouse source.

merge_total_max_bytes_to_prewarm_cache

Only available in ClickHouse Cloud. Maximal size of parts in total to prewarm cache during merge.

merge_workload

Used to regulate how resources are utilized and shared between merges and other workloads. Specified value is used as workload setting value for background merges of this table. If not specified (empty string), then server setting merge_workload is used instead. See Also
Last modified on July 22, 2026