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

inactive_parts_to_delay_insert

If the number of inactive parts in a single partition in the table exceeds the inactive_parts_to_delay_insert value, an INSERT is artificially slowed down.
It is useful when a server fails to clean up parts quickly enough.
Possible values:
  • Any positive integer.

inactive_parts_to_throw_insert

If the number of inactive parts in a single partition more than the inactive_parts_to_throw_insert value, INSERT is interrupted with the following error:
“Too many inactive parts (N). Parts cleaning are processing significantly slower than inserts” exception.”
Possible values:
  • Any positive integer.
Last modified on July 23, 2026