# Configuration Reference

## Overview

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

This section lists the [workspace, database, and table limits](https://docs.singlestore.com/cloud/reference/configuration-reference/system-limits.md) for your SingleStore Helios instance.

## In this section

* [AVX2 Instruction Set Verification](https://docs.singlestore.com/cloud/reference/configuration-reference/avx-2-instruction-set-verification.md)
* [Engine Variables](https://docs.singlestore.com/cloud/reference/configuration-reference/engine-variables.md)
* [System Limits](https://docs.singlestore.com/cloud/reference/configuration-reference/system-limits.md)

***

Modified at: September 29, 2023

Source: [/cloud/reference/configuration-reference/](https://docs.singlestore.com/cloud/reference/configuration-reference/)

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