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Database size

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It aggregates the sizes of tables for each database and provides trend data in a chart. You can identify and manage the trend in database capacity growth. You can prepare for rapid capacity increases by identifying them in advance.

Database size can affect the performance. You can prepare to troubleshoot performance issues because the increase in size can delay the query execution. It is also required to identify and prevent problems in advance that may increase the size due to incorrect queries or database structure issues.

The trend in database size helps you understand usage patterns and data growth. You can predict future capacity requirements and take possible actions. Monitoring these changes helps you optimize the resources and costs.

MySQL database size can be seen in information_schema.tables, and the monitoring account must have the table search role for aggregation. Role settings are required as follows.

grant select on {DB_NAME}.* to whatap;
  • The sizes for information_schema and performance_schema are not collected.

  • The collection cycle is collected once every hour.

Basic screen guide

Database size

  1. Set the time to search in Time. You can also select a lookup time by clicking the green button.

  2. Select a target to view in Instance.

  3. Select Search icon.

  • The lookup time can be set up to 62 days. In case of a view for 3 days or more, the graph displays the daily average.

  • Select the clock display area to query a random date and time. If you click the text range for date and time, the option appears to select the date and time.

Checking the changes over time

If you select the graph bar at a specific time in Size trend, you can see the database size trend and change amounts from the start time to the selected time in a list.

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Checking the sizes for each table

If you select a database in Size details, you can see the list of sizes for each table in the top 50.

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It displays DATA SIZE, INDEX SIZE, ROWS for each table by default. This is the information for information_schema.tables and may differ from the actual size. To see the FILE SIZE of information_schema.innodb_tablespaces, set the following option in the DBX agent. This size is close to the actual size.


It targets the tables for which the monitoring account has the query role. For more information about the monitoring account creation, see the following.

It displays DATA SIZE and INDEX SIZE for each table. In the table list of the Table size (TOP 50) section, select the TABLENAME column. Then the Object detail window appears for columns and index items.

Object detail


This function is supported in DBX agent 1.6.15 or later. For more information about the database roles and related settings, see the following.

Downloading the viewed data

You can download the searched data as a CSV format file. Select Download icon and then select Size details or Table size (TOP 50).