我们准备备份或维护数据的时候,常常会考虑磁盘空间大小的问题,通常需要知道我们的数据和日志有多大,数据是至关重要的,数据是生命线.
使用mysqldiskusage 工具来查看数据库实例使用到的空间,包括数据库和各种日志大小.
实例:
- shell> sudo env PYTHONPATH=$PYTHONPATH mysqldiskusage /
- --server=root:root@localhost --all
- # Source on localhost: ... connected.
- # Database totals:
- +-----------------+--------------+
- | db_name | total |
- +-----------------+--------------+
- | oltp2 | 829,669 |
- | bvm | 15,129 |
- | db1 | 9,895 |
- | db2 | 11,035 |
- | employees | 206,117,692 |
- | griots | 14,415 |
- | mysql | 995,722 |
- | oltp1 | 177,393 |
- | room_temp | 9,847 |
- | sakila | 791,727 |
- | test | 647,911 |
- | test_arduino | 9,999 |
- | welford_kindle | 72,032 |
- | world | 472,785 |
- | world_innodb | 829,669 |
- +-----------------+--------------+
- Total database disk usage = 210,175,251 bytes or 200.44 MB
- # Log information.
- +--------------------+--------------+
- | log_name | size |
- +--------------------+--------------+
- | host123.log | 957,282,265 |
- | host123-slow.log | 123,647 |
- | host123.local.err | 321,772,803 |
- +--------------------+--------------+
- Total size of logs = 1,279,178,715 bytes or 1.19 GB
- # Binary log information:
- Current binary log file = my_log.000287
- +----------------+---------+
- | log_file | size |
- +----------------+---------+
- | my_log.000285 | 252208 |
- | my_log.000286 | 256 |
- | my_log.000287 | 3063 |
- | my_log.index | 48 |
- +----------------+---------+
- Total size of binary logs = 255,575 bytes or 249.58 KB
- # Server is not an active slave - no relay log information.
- # InnoDB tablespace information: --Vevb.com
- +--------------+--------------+
- | innodb_file | size |
- +--------------+--------------+
- | ib_logfile0 | 5,242,880 |
- | ib_logfile1 | 5,242,880 |
- | ibdata1 | 815,792,128 |
- | ibdata2 | 52,428,800 |
- +--------------+--------------+
- Total size of InnoDB files = 889,192,448 bytes or 848.00 MB
- InnoDB freespace = 635,437,056 bytes or 606.00 MB
使用–all选项,将显示所有日志和InnoDB的磁盘使用情况,也会列出所有数据库,即使不包含任何数据.
权限:用户必须具有读取数据目录的权限.
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