- mysql> show global status like 'Innodb_os_log_written';select sleep(60);show global status like 'Innodb_os_log_written';
- +-----------------------+-------+
- | Variable_name | Value |
- +-----------------------+-------+
- | Innodb_os_log_written | 3584 |
- +-----------------------+-------+
- 1 row in set (0.00 sec)
- +-----------+
- | sleep(60) |
- +-----------+
- | 0 |
- +-----------+
- 1 row in set (1 min 0.04 sec)
- +-----------------------+--------+
- | Variable_name | Value |
- +-----------------------+--------+
- | Innodb_os_log_written | 19200112 |
- +-----------------------+--------+
- 1 row in set (0.00 sec)
- mysql> select (19200112-3584)*60 /1024/1204 as MB_PER_HOUR;
- +--------------+
- | MB_PER_HOUR |
- +--------------+
- | 934.21641404 |
- +--------------+
- 1 row in set (0.00 sec)
MySQL默認使用兩個日誌文件,設置innodb_log_file_size=500M
- mysql> show global status like 'Innodb_log_waits';
- +------------------+-------+
- | Variable_name | Value |
- +------------------+-------+
- | Innodb_log_waits | 0 |
- +------------------+-------+
- 1 row in set (0.00 sec)