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

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external_storage_connect_timeout_sec

Connect timeout in seconds. Now supported only for MySQL

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external_storage_max_read_bytes

Limit maximum number of bytes when table with external engine should flush history data. Now supported only for MySQL table engine, database engine, and dictionary. If equal to 0, this setting is disabled

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external_storage_max_read_rows

Limit maximum number of rows when table with external engine should flush history data. Now supported only for MySQL table engine, database engine, and dictionary. If equal to 0, this setting is disabled

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external_storage_rw_timeout_sec

Read/write timeout in seconds. Now supported only for MySQL
Last modified on July 23, 2026