MySQL monitoring

Deprecation notice

This extension documentation is now deprecated and will no longer be updated. We recommend using the new MySQL extension for improved functionality and support.

Learn how to monitor your MySQL database using the MySQL ActiveGate extension. The extension supports MySQL versions 5.7 and 8, as well as the corresponding versions of MariaDB and Percona Server.

Prerequisites

Environment ActiveGate with remote access to the MySQL database server
A MySQL database user ¹

This extension uses the "show global status" and "show global variables" commands. The commands don't require any specific privileges, only the ability to connect to the server.

Extension installation

To install the MySQL database extension

In the Dynatrace menu, go to Hub.
Find and select MySQL (remote monitoring).
Select Download to get the extension ZIP file. Don't rename the file.
Unzip the ZIP file to the plugin_deployment directory of your ActiveGate host. If the resulting directory structure isn't
```
1.\plugin_deployment\<EXTENSION-SPECIFIC-DIRECTORY>\
```
where <EXTENSION-SPECIFIC-DIRECTORY> is the name of the directory containing the files for this extension, make the necessary changes.
In Dynatrace, go to Settings > Monitoring > Monitored technologies.
Select Add new technology monitoring and then Add ActiveGate extension.
Select Upload extension and upload the ZIP file.
After you upload the extension, go to Settings > Monitoring > Monitored technologies and switch to the Custom extensions tab.
Find the extension and select it to open it for Endpoint configuration.
Enter the endpoint information.

Setting	Details
Endpoint name	Enter a meaningful endpoint name.
User	The MySQL database user name.
Password	The MySQL database user password.
Host Name	The DNS or IP address that the database resides on.
Port number	The default port is `3306`.
Choose ActiveGate	Type or select an ActiveGate.

Metrics

Available metrics are listed below.

Connections

Connections
Connection Errors

Throughput

Queries
Questions
Slow Queries
Slow Queries Rate

Threads

Connected
Created
Running

Commands

Delete
Delete-multi
Insert
Insert-select
Select
Replace-select
Update
Update-multi

InnoDB

InnoDB file I/O - reads
InnoDB file I/O - writes
InnoDB buffer pool size
InnoDB buffer pool pages - Total
InnoDB buffer pool pages - Dirty
InnoDB buffer pool pages - Free
InnoDB buffer pool pages - Data

Query Cache

Query Cache Hits
Query Cache - Not cached
Free memory
Queries in cache

Tables

Table locks - Waited
Table locks - Immediate
Created temporary tables - Disk Tables
Created temporary tables - Tables