Monitoring the MySQL database for WordPress using Query Monitor

The Query Monitor plugin is a powerful tool for debugging and monitoring WordPress performance. It allows developers to view and analyze MySQL queries in real time, helping to identify slow or problematic queries that may affect site speed. On ruachost.com, Query Monitor is fully supported and can be installed directly from the WordPress dashboard.

Why Use Query Monitor?

• Detects slow or duplicate database queries.
• Shows queries grouped by plugins, themes, or functions.
• Helps troubleshoot performance bottlenecks.
• Provides insights into PHP errors, hooks, and HTTP requests.

Steps to Install and Configure Query Monitor

1. Log in to WordPress with an administrator account.
2. In the dashboard, go to Plugins → Add New.
3. Search for Query Monitor.
4. Click Install Now, then Activate.
5. After activation, go to Plugins → Installed Plugins → Query Monitor → Settings.
6. The Query Monitor panel will appear at the bottom of your WordPress admin screen.

Using Query Monitor to Monitor MySQL

• Open any WordPress page in the admin dashboard.

• Scroll down to the Query Monitor panel.

• You’ll see detailed information including:

  • Database Queries → List of queries executed on the page.
  • Query Time → Execution time for each query.
  • Duplicate Queries → Queries that run multiple times unnecessarily.
  • Query Source → Which plugin, theme, or function triggered the query.

• Use this information to optimize your database and improve site performance.

Important Notes

• Query Monitor is intended for developers and administrators.
• It should not be left active on production sites for long periods due to overhead.
• Always test changes on a staging environment before applying them live.