---
title: "Parameter Group"
description: "Set engine configuration values for a MySQL, MariaDB, or PostgreSQL DBaaS instance in a parameter group, and apply them by attaching the group."
content_type: "overview"
product: "database"
platform: "MyAccount"
url: "/myaccount/parameter-group/"
---

# Parameter Group

A parameter group holds engine configuration values for one engine and version, such as MySQL-8.0.
Attach it to a DBaaS instance, and the primary runs with those values; after you edit the values,
sync the group to apply the changes; syncing restarts each DBaaS instance it is attached to.
Parameter groups are under **Database > Parameter Group** in MyAccount.

## What you can do

- [Create and edit a parameter group](/myaccount/parameter-group/how-to/create-and-edit-a-parameter-group/)
  for an engine and version, set its values, and sync them to your DBaaS instances.
- [Attach a parameter group to a DBaaS instance](/myaccount/parameter-group/how-to/attach-a-parameter-group-to-a-database/)
  to apply its values to the primary of that DBaaS instance.
- [Move a parameter group to another project](/myaccount/parameter-group/how-to/move-a-parameter-group-to-another-project/)
  in the same account, to attach it to DBaaS instances there.

For the settings you are most likely to change, such as the connection limit, the time zone, and
memory, see
[Common parameter group settings](/myaccount/parameter-group/concepts/common-parameter-group-settings/).

## Where to start

[Create and edit a parameter group](/myaccount/parameter-group/how-to/create-and-edit-a-parameter-group/)
for the engine and version your DBaaS instance runs.