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80 lines
2.9 KiB
Markdown
80 lines
2.9 KiB
Markdown
---
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toc_priority: 61
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toc_title: Settings Profiles
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---
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# Settings Profiles {#settings-profiles}
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A settings profile is a collection of settings grouped under the same name.
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!!! note "Information"
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ClickHouse also supports [SQL-driven workflow](../../operations/access-rights.md#access-control) for managing settings profiles. We recommend using it.
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The profile can have any name. You can specify the same profile for different users. The most important thing you can write in the settings profile is `readonly=1`, which ensures read-only access.
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Settings profiles can inherit from each other. To use inheritance, indicate one or multiple `profile` settings before the other settings that are listed in the profile. In case when one setting is defined in different profiles, the latest defined is used.
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To apply all the settings in a profile, set the `profile` setting.
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Example:
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Install the `web` profile.
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``` sql
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SET profile = 'web'
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```
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Settings profiles are declared in the user config file. This is usually `users.xml`.
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Example:
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``` xml
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<!-- Settings profiles -->
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<profiles>
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<!-- Default settings -->
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<default>
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<!-- The maximum number of threads when running a single query. -->
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<max_threads>8</max_threads>
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</default>
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<!-- Settings for quries from the user interface -->
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<web>
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<max_rows_to_read>1000000000</max_rows_to_read>
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<max_bytes_to_read>100000000000</max_bytes_to_read>
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<max_rows_to_group_by>1000000</max_rows_to_group_by>
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<group_by_overflow_mode>any</group_by_overflow_mode>
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<max_rows_to_sort>1000000</max_rows_to_sort>
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<max_bytes_to_sort>1000000000</max_bytes_to_sort>
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<max_result_rows>100000</max_result_rows>
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<max_result_bytes>100000000</max_result_bytes>
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<result_overflow_mode>break</result_overflow_mode>
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<max_execution_time>600</max_execution_time>
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<min_execution_speed>1000000</min_execution_speed>
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<timeout_before_checking_execution_speed>15</timeout_before_checking_execution_speed>
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<max_columns_to_read>25</max_columns_to_read>
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<max_temporary_columns>100</max_temporary_columns>
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<max_temporary_non_const_columns>50</max_temporary_non_const_columns>
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<max_subquery_depth>2</max_subquery_depth>
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<max_pipeline_depth>25</max_pipeline_depth>
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<max_ast_depth>50</max_ast_depth>
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<max_ast_elements>100</max_ast_elements>
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<readonly>1</readonly>
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</web>
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</profiles>
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```
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The example specifies two profiles: `default` and `web`.
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The `default` profile has a special purpose: it must always be present and is applied when starting the server. In other words, the `default` profile contains default settings.
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The `web` profile is a regular profile that can be set using the `SET` query or using a URL parameter in an HTTP query.
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[Original article](https://clickhouse.com/docs/en/operations/settings/settings_profiles/) <!--hide-->
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