# Magento_MysqlMq module
**Magento_MysqlMq** provides message queue implementation based on MySQL.
Module contain recurring script, declared in `Magento\MysqlMq\Setup\Recurring`
class. This script is executed by Magento post each schema installation or upgrade
stage and populates the queue table.
## Installation
Module creates the following tables:
- `queue` - Table storing unique queues
- `queue_message` - Queue messages
- `queue_message_status` - Relation table to keep associations between queues and messages
For information about a module installation in Magento 2, see [Enable or disable modules](https://devdocs.magento.com/guides/v2.4/install-gde/install/cli/install-cli-subcommands-enable.html).
## Additional information
For information about significant changes in patch releases, see [2.3.x Release information](http://devdocs.magento.com/guides/v2.3/release-notes/bk-release-notes.html).
### cron options
cron group configuration can be set in `etc/crontab.xml`.
- `mysqlmq_clean_messages` - clean up old messages from database
|