# Configuration Reference

## Overview

> **📝 Note**: In SingleStore, you cannot set global variables or sync variables.

This section lists the [engine variables](https://docs.singlestore.com/db/v9.1/reference/configuration-reference/engine-variables.md) that you can set to configure your SingleStore cluster. Prior to setting these variables, you should understand [how sync and non-sync variables work](https://docs.singlestore.com/db/v9.1/reference/configuration-reference/engine-variables.md).

This section also explains the configuration files used by the [SingleStore management tools](https://docs.singlestore.com/db/v9.1/user-and-cluster-administration/cluster-management-with-tools.md) and by the lower-level management tool, [memsqlctl](https://docs.singlestore.com/db/v9.1/reference/configuration-reference/cluster-config-files/singlestore-server-config-files.md).

Finally, this section lists the [cluster, database, and table limits](https://docs.singlestore.com/db/v9.1/reference/configuration-reference/system-limits.md) for your SingleStore configuration.

## In this section

* [Cluster Configuration](https://docs.singlestore.com/db/v9.1/reference/configuration-reference/cluster-configuration.md)
* [Cluster Config Files](https://docs.singlestore.com/db/v9.1/reference/configuration-reference/cluster-config-files.md)
* [System Limits](https://docs.singlestore.com/db/v9.1/reference/configuration-reference/system-limits.md)
* [Engine Variables](https://docs.singlestore.com/db/v9.1/reference/configuration-reference/engine-variables.md)

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Modified at: September 29, 2023

Source: [/db/v9.1/reference/configuration-reference/](https://docs.singlestore.com/db/v9.1/reference/configuration-reference/)

(An index of the documentation is available at /llms.txt)