MySQL Utilities

5.11 mysqldiskusage — Show Database Disk Usage

This utility displays disk space usage for one or more databases. The utility optionally displays disk usage for the binary log, slow query log, error log, general query log, relay log, and InnoDB tablespaces. The default is to only show database disk usage.

If the command-line lists no databases, the utility shows the disk space usage for all databases.

Sizes displayed without a unit indicator (such as MB) are in bytes.

The utility determines the location of the data directory by requesting it from the server. For a local server, the utility obtains size information directly from files in the data directory and InnoDB home directory. In this case, you must have file system access to read those directories. Disk space usage shown includes the sum of all storage engine- specific files such as the .MYI and .MYD files for MyISAM and the tablespace files for InnoDB.

If the file system read fails, or if the server is not local, the utility cannot determine exact file sizes. It is limited to information that can be obtained from the system tables, which therefore should be considered an estimate. For information read from the server, the account used to connect to the server must have the appropriate permissions to read any objects accessed during the operation.

If information requested requires file system access but is not available that way, the utility prints a message that the information is not accessible. This occurs, for example, if you request log usage but the server is not local and the log files cannot be examined directly.

To specify how to display output, use one of the following values with the --format option:

To turn off the headers for grid, csv, or tab display format, specify the --no-headers option.


mysqldiskusage accepts the following command-line options:

For the --format option, the permitted values are not case-sensitive. In addition, values may be specified as any unambiguous prefix of a valid value. For example, --format=g specifies the grid format. An error occurs if a prefix matches more than one valid value.


You must provide connection parameters (user, host, password, and so forth) for an account that has the appropriate privileges for all objects accessed during the operation.

The path to the MySQL client tools should be included in the PATH environment variable in order to use the authentication mechanism with login-paths. This permits the utility to use the my_print_defaults tools which is required to read the login-path values from the login configuration file (.mylogin.cnf).


To show only the disk space usage for the employees and test databases in grid format (the default), use this command:

shell> mysqldiskusage --server=root@localhost employees test
# Source on localhost: ... connected.
# Database totals:
| db_name    |       total  |
| employees  | 205,979,648  |
| test       |       4,096  |

Total database disk usage = 205,983,744 bytes or 196.00 MB


To see all disk usage for the server in CSV format, use this command:

shell> mysqldiskusage --server=root@localhost --format=csv -a -vv
# Source on localhost: ... connected.
# Database totals:

Total database disk usage = 449,490,516 bytes or 428.00 MB

# Log information.
# The general_log is turned off on the server.
# The slow_query_log is turned off on the server.

# binary log information:
Current binary log file = ./mysql-bin.000076

Total size of binary logs = 168,399,105 bytes or 160.00 MB

# Server is not an active slave - no relay log information.
# InnoDB tablespace information:
/data/ib_logfile0,5242880,log file,
/data/ib_logfile1,5242880,log file,
/data/ibdata1,220200960,shared tablespace,ibdata1:210M
/data/ibdata2,10485760,shared tablespace,ibdata2:10M:autoextend
/data/employees/departments.ibd,114688,file tablespace,
/data/employees/dept_emp.ibd,30408704,file tablespace,
/data/employees/dept_manager.ibd,131072,file tablespace,
/data/employees/employees.ibd,23068672,file tablespace,
/data/employees/salaries.ibd,146800640,file tablespace,
/data/employees/titles.ibd,41943040,file tablespace,

Total size of InnoDB files = 494,125,056 bytes or 471.00 MB



The user must have permissions to read the data directory or use an administrator, super user (sudo), or an account with elevated privileges to obtain access to the data directory.