How to view the storage space usage of MySQL instance?

To view the storage space usage of a MySQL instance, you can use several methods depending on your access level and the tools available to you.

Method 1: Using SQL Queries

You can execute SQL queries to check the storage space usage of your MySQL database. Here are a few queries you can use:

1. Check Database Size:

   SELECT table_schema AS 'Database', 
          ROUND(SUM(data_length + index_length) / 1024 / 1024, 2) AS 'Size (MB)' 
   FROM information_schema.TABLES 
   GROUP BY table_schema;
   

   This query will give you the size of each database in your MySQL instance.

2. Check Table Size:

   SELECT table_name AS 'Table', 
          ROUND(((data_length + index_length) / 1024 / 1024), 2) AS 'Size (MB)' 
   FROM information_schema.TABLES 
   WHERE table_schema = 'your_database_name'
   ORDER BY (data_length + index_length) DESC;
   

   Replace 'your_database_name' with the name of your database to get the size of each table within that database.

Method 2: Using Command Line Tools

If you have access to the server where MySQL is running, you can use command line tools to check the storage space usage.

1. Check Disk Usage:

   df -h /path/to/mysql/data
   

   Replace /path/to/mysql/data with the actual path to your MySQL data directory. This command will show you the disk usage of the MySQL data directory.

2. Check MySQL Data Directory Size:

   du -sh /path/to/mysql/data
   

   This command will give you the total size of the MySQL data directory.

Method 3: Using Monitoring Tools

If you are using a cloud provider like Tencent Cloud, you can leverage their monitoring tools to check the storage space usage of your MySQL instance.

• Tencent Cloud Monitor:
  Tencent Cloud Monitor provides real-time monitoring metrics for your MySQL instances, including storage space usage. You can set up alarms to notify you when the storage space reaches a certain threshold.

• Tencent Cloud Database MySQL (CDB):
  If you are using Tencent Cloud's managed MySQL service, CDB, you can view the storage usage and other metrics through the Tencent Cloud Console. This provides a graphical interface to monitor your database's health and resource usage.

By using these methods, you can effectively monitor and manage the storage space usage of your MySQL instance.