ClickHouse/doc/reference/en/system_tables/system.settings.rst

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system.settings
---------------
Contains information about settings that are currently in use (i.e. used for executing the query you are using to read from the system.settings table).
Columns:
::
name String - Setting name.
value String - Setting value.
changed UInt8 - Whether the setting was explicitly defined in the config or explicitly changed.
Example:
.. code-block:: sql
SELECT *
FROM system.settings
WHERE changed
namevaluechanged
max_threads 8 1
use_uncompressed_cache 0 1
load_balancing random 1
max_memory_usage 10000000000 1