DEV环境清理磁盘空间 以及 设置MYSQL BINLOG 自动回滚

mysql> show variables like '%log%';

+---------------------------------+------------------------------------+

| Variable_name | Value |

+---------------------------------+------------------------------------+

| back_log | 50 |

| binlog_cache_size | 32768 |

| binlog_format | MIXED |

| expire_logs_days | 0 |

| general_log | OFF |

| general_log_file | /usr/local/mysql/var/dev.log |

| innodb_flush_log_at_trx_commit | 1 |

| innodb_locks_unsafe_for_binlog | OFF |

| innodb_log_buffer_size | 1048576 |

| innodb_log_file_size | 5242880 |

| innodb_log_files_in_group | 2 |

| innodb_log_group_home_dir | ./ |

| innodb_mirrored_log_groups | 1 |

| log | OFF |

| log_bin | ON |

| log_bin_trust_function_creators | OFF |

| log_bin_trust_routine_creators | OFF |

| log_error | /usr/local/mysql/var/dev.err |

| log_output | FILE |

| log_queries_not_using_indexes | OFF |

| log_slave_updates | OFF |

| log_slow_queries | ON |

| log_warnings | 1 |

| max_binlog_cache_size | 18446744073709547520 |

| max_binlog_size | 1073741824 |

| max_relay_log_size | 0 |

| relay_log | |

| relay_log_index | |

| relay_log_info_file | relay-log.info |

| relay_log_purge | ON |

| relay_log_space_limit | 0 |

| slow_query_log | ON |

| slow_query_log_file | /usr/local/mysql/var/slowquery.log |

| sql_log_bin | ON |

| sql_log_off | OFF |

| sql_log_update | ON |

| sync_binlog | 0 |

+---------------------------------+------------------------------------+

37 rows in set (0.00 sec)

 

mysql> show binary logs;

+------------------+------------+

| Log_name | File_size |

+------------------+------------+

| mysql-bin.000037 | 122272086 |

| mysql-bin.000038 | 1073752203 |

| mysql-bin.000039 | 387324827 |

| mysql-bin.000040 | 1073741879 |

| mysql-bin.000041 | 1074498356 |

| mysql-bin.000042 | 1074475113 |

| mysql-bin.000043 | 1073923177 |

| mysql-bin.000044 | 359009653 |

+------------------+------------+

8 rows in set (0.00 sec)

 

mysql> purge binary logs to 'mysql-bin.000041';

Query OK, 0 rows affected (4.31 sec)

 

mysql> show binary logs;

+------------------+------------+

| Log_name | File_size |

+------------------+------------+

| mysql-bin.000041 | 1074498356 |

| mysql-bin.000042 | 1074475113 |

| mysql-bin.000043 | 1073923177 |

| mysql-bin.000044 | 359010115 |

+------------------+------------+

4 rows in set (0.00 sec)

 

mysql> set global expire_logs_days=3;

Query OK, 0 rows affected (0.06 sec)

 

 

/etc/my.cnf

add

expire_logs_days = 3

这里需要重启 但尚未重启 等待下次重启即可生效