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

mutations_max_literal_size_to_replace

The maximum size of serialized literal in bytes to replace in UPDATE and DELETE queries. Takes effect only if at least one the two settings above is enabled. Default value: 16384 (16 KiB).

mutations_sync

Allows to execute ALTER TABLE ... UPDATE|DELETE|MATERIALIZE INDEX|MATERIALIZE PROJECTION|MATERIALIZE COLUMN|MATERIALIZE STATISTICS queries (mutations) synchronously. Possible values:
Last modified on July 22, 2026