mysql binlog event格式是什么样的
发表于：2026-11-01 作者：千家信息网编辑
千家信息网最后更新 2026年11月01日，mysql binlog event格式是什么样的，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。首先发起几个事务，生成一
千家信息网最后更新 2026年11月01日mysql binlog event格式是什么样的
mysql binlog event格式是什么样的，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。
首先发起几个事务，生成一个新的binlog方便分析。
flush logs; insert into t4 values(7,7,7); update t4 set a=8 where a=7; delete from t4 where a=8; alter table t4 add key idx_t4_c(c); flush logs; |
每一个event都分为三个部分组成。event head,event data,event footer。
Event header：
Timestamp | 4字节 | 这个值是1970年1月日0时0分0秒以来的秒数，该值有一个很大的作用是从库计算Seconds_Behind_Master关键值。 |
Type_code | 1字节 | Event事件编码。 |
Server_id | 4字节 | 生成event的服务器的server_id。即使从库开启了log_slave_updates参数，从库将此event写入binlog时，记录的也是主库的server_id。 |
Event_len | 4字节 | Event的长度 |
End_log_p | 4字节 | 下一个event的起始位置 |
Flags | 2字节 |
Event footer：包括一个4字节的crc，标识此event的完整性。
查看生成的mysql-bin.000050的event：
mysql> show binlog events in 'mysql-bin.000050';+------------------+------+----------------+-----------+-------------+-----------------------------------------------------------------------+| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |+------------------+------+----------------+-----------+-------------+-----------------------------------------------------------------------+| mysql-bin.000050 | 4 | Format_desc | 1051295 | 123 | Server ver: 5.7.24-log, Binlog ver: 4 || mysql-bin.000050 | 123 | Previous_gtids | 1051295 | 194 | 4c312339-ab38-11e9-86a8-000c29050245:2-90058 || mysql-bin.000050 | 194 | Gtid | 1051295 | 259 | SET @@SESSION.GTID_NEXT= '4c312339-ab38-11e9-86a8-000c29050245:90059' || mysql-bin.000050 | 259 | Query | 1051295 | 331 | BEGIN || mysql-bin.000050 | 331 | Table_map | 1051295 | 378 | table_id: 110 (ming.t4) || mysql-bin.000050 | 378 | Write_rows | 1051295 | 426 | table_id: 110 flags: STMT_END_F || mysql-bin.000050 | 426 | Xid | 1051295 | 457 | COMMIT /* xid=30 */ || mysql-bin.000050 | 457 | Gtid | 1051295 | 522 | SET @@SESSION.GTID_NEXT= '4c312339-ab38-11e9-86a8-000c29050245:90060' || mysql-bin.000050 | 522 | Query | 1051295 | 594 | BEGIN || mysql-bin.000050 | 594 | Table_map | 1051295 | 641 | table_id: 110 (ming.t4) || mysql-bin.000050 | 641 | Update_rows | 1051295 | 703 | table_id: 110 flags: STMT_END_F || mysql-bin.000050 | 703 | Xid | 1051295 | 734 | COMMIT /* xid=31 */ || mysql-bin.000050 | 734 | Gtid | 1051295 | 799 | SET @@SESSION.GTID_NEXT= '4c312339-ab38-11e9-86a8-000c29050245:90061' || mysql-bin.000050 | 799 | Query | 1051295 | 871 | BEGIN || mysql-bin.000050 | 871 | Table_map | 1051295 | 918 | table_id: 110 (ming.t4) || mysql-bin.000050 | 918 | Delete_rows | 1051295 | 966 | table_id: 110 flags: STMT_END_F || mysql-bin.000050 | 966 | Xid | 1051295 | 997 | COMMIT /* xid=32 */ || mysql-bin.000050 | 997 | Gtid | 1051295 | 1062 | SET @@SESSION.GTID_NEXT= '4c312339-ab38-11e9-86a8-000c29050245:90062' || mysql-bin.000050 | 1062 | Query | 1051295 | 1170 | use `ming`; alter table t4 add key idx_t4_c(c) || mysql-bin.000050 | 1170 | Rotate | 1051295 | 1217 | mysql-bin.000051;pos=4 |+------------------+------+----------------+-----------+-------------+-----------------------------------------------------------------------+
20 rows in set (0.00 sec)
用mysqlbinlog --hexdump分析下日志
[root@cdbtest1 binlog]# mysqlbinlog --hexdump mysql-bin.000050|more/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;DELIMITER /*!*/;# at 4#200209 19:44:20 server id 1051295 end_log_pos 123 CRC32 0x3e1b7c96 # Position Timestamp Type Master ID Size Master Pos Flags # 4 94 f0 3f 5e 0f 9f 0a 10 00 77 00 00 00 7b 00 00 00 00 00# 17 04 00 35 2e 37 2e 32 34 2d 6c 6f 67 00 00 00 00 |..5.7.24.log....|# 27 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|# 37 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|# 47 00 00 00 00 00 00 00 00 13 38 0d 00 08 00 12 00 |.........8......|# 57 04 04 04 04 12 00 00 5f 00 04 1a 08 00 00 00 08 |................|# 67 08 08 02 00 00 00 0a 0a 0a 2a 2a 00 12 34 00 01 |.............4..|# 77 96 7c 1b 3e |....|# Start: binlog v 4, server v 5.7.24-log created 200209 19:44:20
Timestamp:实际上是16进制的'0x5e3ff094',换算为10进制就是1581248660：[root@cdbtest1 ~]# echo $((0x5e3ff094))1581248660转换为时间，也就是日志解析出来的200209 19:44:20[root@cdbtest1 ~]# date -d @1581248660 2020年 02月 09日 星期日 19:44:20 CSTType：0f，也就是10进制的15.Format_desc=15，该event记录了binary log的版本信息，在每一个binary log开头。Master ID ：16进制的'0x00100a9f',也就是10进制的1051295，正是server_idSize:16进制的77，是10进制的119，正好是下一个event的at 123到该event的at 4的差值。Master Pos：下一个event开始的地址，16进制的7b，等于10进制的123.根据show binlog events in 'mysql-bin.000050'结果，可以得到如下TYPE对应关系：Format_desc=15：该event记录了binary log的版本信息Previous_gtids=35：该event说明之前binary log包含的gtid set。如果是在relay log中，则记录IO线程收到的gtid set。Gtid=33：gtid信息Query=2：语句模式下记录实际的语句。Table_map=19，table_id和具体表名的映射。比如：Table_map: `ming`.`t4` mapped to number 110Write_rows=30：insert语句生成的eventXid=16：事务结束时添加一个xid信息作为结束的标志。Update_rows=31：update语句生成的eventDelete_rows=32：delete语句生成的eventRotate=4：binlog发生主动或者被动切换，这时会在当前binlog文件末尾添加一个ROTATE_EVENT事件。
下面是剩余的binary log，供分析查看：
BINLOG 'lPA/Xg+fChAAdwAAAHsAAAAAAAQANS43LjI0LWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAAXwAEGggAAAAICAgCAAAACgoKKioAEjQAAZZ8Gz4='/*!*/;# at 123#200209 19:44:20 server id 1051295 end_log_pos 194 CRC32 0x5b05428a # Position Timestamp Type Master ID Size Master Pos Flags # 7b 94 f0 3f 5e 23 9f 0a 10 00 47 00 00 00 c2 00 00 00 80 00# 8e 01 00 00 00 00 00 00 00 4c 31 23 39 ab 38 11 e9 |........L1.9.8..|# 9e 86 a8 00 0c 29 05 02 45 01 00 00 00 00 00 00 00 |.......E........|# ae 02 00 00 00 00 00 00 00 cb 5f 01 00 00 00 00 00 |................|# be 8a 42 05 5b |.B..|# Previous-GTIDs# 4c312339-ab38-11e9-86a8-000c29050245:2-90058# at 194#200209 19:44:20 server id 1051295 end_log_pos 259 CRC32 0xf1bb8ad0 # Position Timestamp Type Master ID Size Master Pos Flags # c2 94 f0 3f 5e 21 9f 0a 10 00 41 00 00 00 03 01 00 00 00 00# d5 00 4c 31 23 39 ab 38 11 e9 86 a8 00 0c 29 05 02 |.L1.9.8.........|# e5 45 cb 5f 01 00 00 00 00 00 02 00 00 00 00 00 00 |E...............|# f5 00 00 01 00 00 00 00 00 00 00 d0 8a bb f1 |..............|# GTID last_committed=0 sequence_number=1 rbr_only=yes/*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/;SET @@SESSION.GTID_NEXT= '4c312339-ab38-11e9-86a8-000c29050245:90059'/*!*/;# at 259#200209 19:44:20 server id 1051295 end_log_pos 331 CRC32 0x9f31253b # Position Timestamp Type Master ID Size Master Pos Flags # 103 94 f0 3f 5e 02 9f 0a 10 00 48 00 00 00 4b 01 00 00 08 00# 116 03 00 00 00 00 00 00 00 04 00 00 1a 00 00 00 00 |................|# 126 00 00 01 00 00 00 10 00 00 00 00 06 03 73 74 64 |.............std|# 136 04 21 00 21 00 21 00 6d 69 6e 67 00 42 45 47 49 |.......ming.BEGI|# 146 4e 3b 25 31 9f |N..1.|# Query thread_id=3 exec_time=0 error_code=0SET TIMESTAMP=1581248660/*!*/;SET @@session.pseudo_thread_id=3/*!*/;SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;SET @@session.sql_mode=268435456/*!*/;SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;/*!\C utf8 *//*!*/;SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/*!*/;SET @@session.lc_time_names=0/*!*/;SET @@session.collation_database=DEFAULT/*!*/;BEGIN/*!*/;# at 331#200209 19:44:20 server id 1051295 end_log_pos 378 CRC32 0x387080d0 # Position Timestamp Type Master ID Size Master Pos Flags # 14b 94 f0 3f 5e 13 9f 0a 10 00 2f 00 00 00 7a 01 00 00 00 00# 15e 6e 00 00 00 00 00 01 00 04 6d 69 6e 67 00 02 74 |n........ming..t|# 16e 34 00 03 03 03 03 00 04 d0 80 70 38 |4.........p8|# Table_map: `ming`.`t4` mapped to number 110# at 378#200209 19:44:20 server id 1051295 end_log_pos 426 CRC32 0x60bed8e5 # Position Timestamp Type Master ID Size Master Pos Flags # 17a 94 f0 3f 5e 1e 9f 0a 10 00 30 00 00 00 aa 01 00 00 00 00# 18d 6e 00 00 00 00 00 01 00 02 00 03 ff f8 07 00 00 |n...............|# 19d 00 07 00 00 00 07 00 00 00 e5 d8 be 60 |.............|# Write_rows: table id 110 flags: STMT_END_FBINLOG 'lPA/XhOfChAALwAAAHoBAAAAAG4AAAAAAAEABG1pbmcAAnQ0AAMDAwMABNCAcDg=lPA/Xh7fChAAMAAAAKoBAAAAAG4AAAAAAAEAAgAD//gHAAAABwAAAAcAAADl2L5g'/*!*/;# at 426#200209 19:44:20 server id 1051295 end_log_pos 457 CRC32 0x23e1b8fd # Position Timestamp Type Master ID Size Master Pos Flags # 1aa 94 f0 3f 5e 10 9f 0a 10 00 1f 00 00 00 c9 01 00 00 00 00# 1bd 1e 00 00 00 00 00 00 00 fd b8 e1 23 |............|# Xid = 30COMMIT/*!*/;# at 457#200209 19:44:20 server id 1051295 end_log_pos 522 CRC32 0xafc871d8 # Position Timestamp Type Master ID Size Master Pos Flags # 1c9 94 f0 3f 5e 21 9f 0a 10 00 41 00 00 00 0a 02 00 00 00 00# 1dc 00 4c 31 23 39 ab 38 11 e9 86 a8 00 0c 29 05 02 |.L1.9.8.........|# 1ec 45 cc 5f 01 00 00 00 00 00 02 01 00 00 00 00 00 |E...............|# 1fc 00 00 02 00 00 00 00 00 00 00 d8 71 c8 af |...........q..|# GTID last_committed=1 sequence_number=2 rbr_only=yes/*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/;SET @@SESSION.GTID_NEXT= '4c312339-ab38-11e9-86a8-000c29050245:90060'/*!*/;# at 522#200209 19:44:20 server id 1051295 end_log_pos 594 CRC32 0x3918c9f3 # Position Timestamp Type Master ID Size Master Pos Flags # 20a 94 f0 3f 5e 02 9f 0a 10 00 48 00 00 00 52 02 00 00 08 00# 21d 03 00 00 00 00 00 00 00 04 00 00 1a 00 00 00 00 |................|# 22d 00 00 01 00 00 00 10 00 00 00 00 06 03 73 74 64 |.............std|# 23d 04 21 00 21 00 21 00 6d 69 6e 67 00 42 45 47 49 |.......ming.BEGI|# 24d 4e f3 c9 18 39 |N...9|# Query thread_id=3 exec_time=0 error_code=0SET TIMESTAMP=1581248660/*!*/;BEGIN/*!*/;# at 594#200209 19:44:20 server id 1051295 end_log_pos 641 CRC32 0x59d98e78 # Position Timestamp Type Master ID Size Master Pos Flags # 252 94 f0 3f 5e 13 9f 0a 10 00 2f 00 00 00 81 02 00 00 00 00# 265 6e 00 00 00 00 00 01 00 04 6d 69 6e 67 00 02 74 |n........ming..t|# 275 34 00 03 03 03 03 00 04 78 8e d9 59 |4.......x..Y|# Table_map: `ming`.`t4` mapped to number 110# at 641#200209 19:44:20 server id 1051295 end_log_pos 703 CRC32 0x68314371 # Position Timestamp Type Master ID Size Master Pos Flags # 281 94 f0 3f 5e 1f 9f 0a 10 00 3e 00 00 00 bf 02 00 00 00 00# 294 6e 00 00 00 00 00 01 00 02 00 03 ff ff f8 07 00 |n...............|# 2a4 00 00 07 00 00 00 07 00 00 00 f8 08 00 00 00 07 |................|# 2b4 00 00 00 07 00 00 00 71 43 31 68 |.......qC1h|# Update_rows: table id 110 flags: STMT_END_FBINLOG 'lPA/XhOfChAALwAAAIECAAAAAG4AAAAAAAEABG1pbmcAAnQ0AAMDAwMABHiO2Vk=lPA/Xh+fChAAPgAAAL8CAAAAAG4AAAAAAAEAAgAD///4BwAAAAcAAAAHAAAA+AgAAAAHAAAABwAAAHFDMWg='/*!*/;# at 703#200209 19:44:20 server id 1051295 end_log_pos 734 CRC32 0x51fe4201 # Position Timestamp Type Master ID Size Master Pos Flags # 2bf 94 f0 3f 5e 10 9f 0a 10 00 1f 00 00 00 de 02 00 00 00 00# 2d2 1f 00 00 00 00 00 00 00 01 42 fe 51 |.........B.Q|# Xid = 31COMMIT/*!*/;# at 734#200209 19:44:20 server id 1051295 end_log_pos 799 CRC32 0x20d2c031 # Position Timestamp Type Master ID Size Master Pos Flags # 2de 94 f0 3f 5e 21 9f 0a 10 00 41 00 00 00 1f 03 00 00 00 00# 2f1 00 4c 31 23 39 ab 38 11 e9 86 a8 00 0c 29 05 02 |.L1.9.8.........|# 301 45 cd 5f 01 00 00 00 00 00 02 02 00 00 00 00 00 |E...............|# 311 00 00 03 00 00 00 00 00 00 00 31 c0 d2 20 |..........1...|# GTID last_committed=2 sequence_number=3 rbr_only=yes/*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/;SET @@SESSION.GTID_NEXT= '4c312339-ab38-11e9-86a8-000c29050245:90061'/*!*/;# at 799#200209 19:44:20 server id 1051295 end_log_pos 871 CRC32 0x44485350 # Position Timestamp Type Master ID Size Master Pos Flags # 31f 94 f0 3f 5e 02 9f 0a 10 00 48 00 00 00 67 03 00 00 08 00# 332 03 00 00 00 00 00 00 00 04 00 00 1a 00 00 00 00 |................|# 342 00 00 01 00 00 00 10 00 00 00 00 06 03 73 74 64 |.............std|# 352 04 21 00 21 00 21 00 6d 69 6e 67 00 42 45 47 49 |.......ming.BEGI|# 362 4e 50 53 48 44 |NPSHD|# Query thread_id=3 exec_time=0 error_code=0SET TIMESTAMP=1581248660/*!*/;BEGIN/*!*/;# at 871#200209 19:44:20 server id 1051295 end_log_pos 918 CRC32 0xff10c266 # Position Timestamp Type Master ID Size Master Pos Flags # 367 94 f0 3f 5e 13 9f 0a 10 00 2f 00 00 00 96 03 00 00 00 00# 37a 6e 00 00 00 00 00 01 00 04 6d 69 6e 67 00 02 74 |n........ming..t|# 38a 34 00 03 03 03 03 00 04 66 c2 10 ff |4.......f...|# Table_map: `ming`.`t4` mapped to number 110# at 918#200209 19:44:20 server id 1051295 end_log_pos 966 CRC32 0xc78da247 # Position Timestamp Type Master ID Size Master Pos Flags # 396 94 f0 3f 5e 20 9f 0a 10 00 30 00 00 00 c6 03 00 00 00 00# 3a9 6e 00 00 00 00 00 01 00 02 00 03 ff f8 08 00 00 |n...............|# 3b9 00 07 00 00 00 07 00 00 00 47 a2 8d c7 |.........G...|# Delete_rows: table id 110 flags: STMT_END_FBINLOG 'lPA/XhOfChAALwAAAJYDAAAAAG4AAAAAAAEABG1pbmcAAnQ0AAMDAwMABGbCEP8=lPA/XiCfChAAMAAAAMYDAAAAAG4AAAAAAAEAAgAD//gIAAAABwAAAAcAAABHoo3H'/*!*/;# at 966#200209 19:44:20 server id 1051295 end_log_pos 997 CRC32 0x346ba50c # Position Timestamp Type Master ID Size Master Pos Flags # 3c6 94 f0 3f 5e 10 9f 0a 10 00 1f 00 00 00 e5 03 00 00 00 00# 3d9 20 00 00 00 00 00 00 00 0c a5 6b 34 |..........k4|# Xid = 32COMMIT/*!*/;# at 997#200209 19:44:20 server id 1051295 end_log_pos 1062 CRC32 0x68ff93c5 # Position Timestamp Type Master ID Size Master Pos Flags # 3e5 94 f0 3f 5e 21 9f 0a 10 00 41 00 00 00 26 04 00 00 00 00# 3f8 01 4c 31 23 39 ab 38 11 e9 86 a8 00 0c 29 05 02 |.L1.9.8.........|# 408 45 ce 5f 01 00 00 00 00 00 02 03 00 00 00 00 00 |E...............|# 418 00 00 04 00 00 00 00 00 00 00 c5 93 ff 68 |.............h|# GTID last_committed=3 sequence_number=4 rbr_only=noSET @@SESSION.GTID_NEXT= '4c312339-ab38-11e9-86a8-000c29050245:90062'/*!*/;# at 1062#200209 19:44:20 server id 1051295 end_log_pos 1170 CRC32 0x80305685 # Position Timestamp Type Master ID Size Master Pos Flags # 426 94 f0 3f 5e 02 9f 0a 10 00 6c 00 00 00 92 04 00 00 00 00# 439 03 00 00 00 00 00 00 00 04 00 00 21 00 00 00 00 |................|# 449 00 00 01 00 00 00 10 00 00 00 00 06 03 73 74 64 |.............std|# 459 04 21 00 21 00 21 00 0c 01 6d 69 6e 67 00 6d 69 |.........ming.mi|# 469 6e 67 00 61 6c 74 65 72 20 74 61 62 6c 65 20 74 |ng.alter.table.t|# 479 34 20 61 64 64 20 6b 65 79 20 69 64 78 5f 74 34 |4.add.key.idx.t4|# 489 5f 63 28 63 29 85 56 30 80 |.c.c..V0.|# Query thread_id=3 exec_time=0 error_code=0use `ming`/*!*/;SET TIMESTAMP=1581248660/*!*/;alter table t4 add key idx_t4_c(c)/*!*/;# at 1170#200209 19:44:21 server id 1051295 end_log_pos 1217 CRC32 0x1862bca8 # Position Timestamp Type Master ID Size Master Pos Flags # 492 95 f0 3f 5e 04 9f 0a 10 00 2f 00 00 00 c1 04 00 00 00 00# 4a5 04 00 00 00 00 00 00 00 6d 79 73 71 6c 2d 62 69 |........mysql.bi|# 4b5 6e 2e 30 30 30 30 35 31 a8 bc 62 18 |n.000051..b.|# Rotate to mysql-bin.000051 pos: 4SET @@SESSION.GTID_NEXT= 'AUTOMATIC' /* added by mysqlbinlog */ /*!*/;DELIMITER ;# End of log file/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
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