| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |
+---------------+-----+-------------+-----------+-------------+-------------------------------------------------------------+
| binlog.000004 | 4 | Format_desc | 1 | 107 | Server ver: 5.5.39-log, Binlog ver: 4 |
| binlog.000004 | 107 | Query | 1 | 194 | create database tempdb |
| binlog.000004 | 194 | Query | 1 | 304 | use `tempdb`; create table tb1(id smallint,val varchar(10)) |
| binlog.000004 | 304 | Query | 1 | 374 | BEGIN |
| binlog.000004 | 374 | Query | 1 | 471 | use `tempdb`; insert into tb1 values(1,'jack') |
| binlog.000004 | 471 | Xid | 1 | 498 | COMMIT /* xid=25 */ |
+---------------+-----+-------------+-----------+-------------+-------------------------------------------------------------+
root@localhost[tempdb]> show binlog events in 'binlog.000004' from 374;
+---------------+-----+------------+-----------+-------------+------------------------------------------------+
| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |
+---------------+-----+------------+-----------+-------------+------------------------------------------------+
| binlog.000004 | 374 | Query | 1 | 471 | use `tempdb`; insert into tb1 values(1,'jack') |
| binlog.000004 | 471 | Xid | 1 | 498 | COMMIT /* xid=25 */ |
+---------------+-----+------------+-----------+-------------+------------------------------------------------+
root@localhost[tempdb]> show binlog events in 'binlog.000004' from 374 limit 1;
+---------------+-----+------------+-----------+-------------+------------------------------------------------+
| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |
+---------------+-----+------------+-----------+-------------+------------------------------------------------+
| binlog.000004 | 374 | Query | 1 | 471 | use `tempdb`; insert into tb1 values(1,'jack') |
+---------------+-----+------------+-----------+-------------+------------------------------------------------+
d、删除历史日志
--使用purge手动删除指定日志
--使用expire-log-days删除失效日志，设置变量expire_logs_days，删除超出这个变量保留期之前的所有日志被删除
--自动日志删除通常发生在服务器启动以及日志flush
--reset master方式
root@localhost[(none)]> help purge;
Name: 'PURGE BINARY LOGS'
Description:
Syntax:
PURGE { BINARY | MASTER } LOGS
{ TO 'log_name' | BEFORE datetime_expr }
Examples:
PURGE BINARY LOGS TO 'mysql-bin.010';
PURGE BINARY LOGS BEFORE '2008-04-02 22:46:26';
root@localhost[tempdb]> purge binary logs to 'binlog.000003';
Query OK, 0 rows affected (0.12 sec)
root@localhost[tempdb]> show binary logs;
+---------------+-----------+
| Log_name | File_size |
+---------------+-----------+
| binlog.000003 | 147 |
| binlog.000004 | 498 |
+---------------+-----------+
root@localhost[tempdb]> system ls -hltr /var/lib/mysql/binarylog/*
-rw-rw---- 1 mysql mysql 147 Oct 3 13:46 /var/lib/mysql/binarylog/binlog.000003
-rw-rw---- 1 mysql mysql 498 Oct 3 14:09 /var/lib/mysql/binarylog/binlog.000004
-rw-rw---- 1 mysql mysql 78 Oct 3 14:23 /var/lib/mysql/binarylog/binlog.index
--使用before子句purge日志，binlog.000003被删除
root@localhos