mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-24 00:22:29 +00:00
50 lines
1.9 KiB
Markdown
50 lines
1.9 KiB
Markdown
---
|
|
title: "Settings Overview"
|
|
sidebar_position: 1
|
|
slug: /en/operations/settings/
|
|
pagination_next: en/operations/settings/settings
|
|
---
|
|
|
|
# Settings Overview
|
|
|
|
:::note
|
|
XML-based Settings Profiles and [configuration files](https://clickhouse.com/docs/en/operations/configuration-files) are currently not supported for ClickHouse Cloud. To specify settings for your ClickHouse Cloud service, you must use [SQL-driven Settings Profiles](https://clickhouse.com/docs/en/operations/access-rights#settings-profiles-management).
|
|
:::
|
|
|
|
There are two main groups of ClickHouse settings:
|
|
|
|
- Global server settings
|
|
- Query-level settings
|
|
|
|
The main distinction between global server settings and query-level settings is that global server settings must be set in configuration files, while query-level settings can be set in configuration files or with SQL queries.
|
|
|
|
Read about [global server settings](/docs/en/operations/server-configuration-parameters/settings.md) to learn more about configuring your ClickHouse server at the global server level.
|
|
|
|
Read about [query-level settings](/docs/en/operations/settings/settings-query-level.md) to learn more about configuring your ClickHouse server at the query level.
|
|
|
|
## See non-default settings
|
|
|
|
To view which settings have been changed from their default value:
|
|
|
|
```sql
|
|
SELECT name, value FROM system.settings WHERE changed
|
|
```
|
|
|
|
If you haven't changed any settings from their default value, then ClickHouse will return nothing.
|
|
|
|
To check the value of a particular setting, specify the `name` of the setting in your query:
|
|
|
|
```sql
|
|
SELECT name, value FROM system.settings WHERE name = 'max_threads'
|
|
```
|
|
|
|
This command should return something like:
|
|
|
|
```response
|
|
┌─name────────┬─value─────┐
|
|
│ max_threads │ 'auto(8)' │
|
|
└─────────────┴───────────┘
|
|
|
|
1 row in set. Elapsed: 0.002 sec.
|
|
```
|