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

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http_connection_timeout

HTTP connection timeout (in seconds). Possible values:
  • Any positive integer.
  • 0 - Disabled (infinite timeout).

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http_make_head_request

The http_make_head_request setting allows the execution of a HEAD request while reading data from HTTP to retrieve information about the file to be read, such as its size. Since it’s enabled by default, it may be desirable to disable this setting in cases where the server does not support HEAD requests.

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http_native_compression_disable_checksumming_on_decompress

Enables or disables checksum verification when decompressing the HTTP POST data from the client. Used only for ClickHouse native compression format (not used with gzip or deflate). For more information, read the HTTP interface description. Possible values:
  • 0 — Disabled.
  • 1 — Enabled.

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http_receive_timeout

HTTP receive timeout (in seconds). Possible values:
  • Any positive integer.
  • 0 - Disabled (infinite timeout).

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http_send_timeout

HTTP send timeout (in seconds). Possible values:
  • Any positive integer.
  • 0 - Disabled (infinite timeout).
It’s applicable only to the default profile. A server reboot is required for the changes to take effect.

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http_skip_not_found_url_for_globs

Skip URLs for globs with HTTP_NOT_FOUND error

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http_wait_end_of_query

Enable HTTP response buffering on the server-side.

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http_write_exception_in_output_format

Write exception in output format to produce valid output. Works with JSON and XML formats.

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http_zlib_compression_level

Sets the level of data compression in the response to an HTTP request if enable_http_compression = 1. Possible values: Numbers from 1 to 12. Levels above 9 require the default build with libdeflate; a build without libdeflate supports levels 1 to 9.
Last modified on July 22, 2026