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4.6.8.1 mysqlbinlog Hex Dump Format

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The --hexdump option causes mysqlbinlog to produce a hex dump of the binary log contents: 

shell> mysqlbinlog --hexdump master-bin.000001

The hex output consists of comment lines beginning with #, so the output might look like this for the preceding command:

  1. /*!40019 SET @@SESSION.max_insert_delayed_threads=0*/;
  2. /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
  3. # at 4
  4. #051024 17:24:13 server id 1  end_log_pos 98
  5. # Position  Timestamp   Type   Master ID        Size      Master Pos    Flags
  6. # 00000004 9d fc 5c 43   0f   01 00 00 00   5e 00 00 00   62 00 00 00   00 00
  7. # 00000017 04 00 35 2e 30 2e 31 35  2d 64 65 62 75 67 2d 6c |..5.0.15.debug.l|
  8. # 00000027 6f 67 00 00 00 00 00 00  00 00 00 00 00 00 00 00 |og..............|
  9. # 00000037 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 |................|
  10. # 00000047 00 00 00 00 9d fc 5c 43  13 38 0d 00 08 00 12 00 |.......C.8......|
  11. # 00000057 04 04 04 04 12 00 00 4b  00 04 1a                |.......K...|
  12. #       Start: binlog v 4, server v 5.0.15-debug-log created 051024 17:24:13
  13. #       at startup
  14. ROLLBACK;

Hex dump output currently contains the elements in the following list. This format is subject to change. For more information about binary log format, see MySQL Internals: The Binary Log.

  • Position: The byte position within the log file.

  • Timestamp: The event timestamp. In the example shown, '9d fc 5c 43' is the representation of '051024 17:24:13' in hexadecimal.

  • Type: The event type code.

  • Master ID: The server ID of the master that created the event.

  • Size: The size in bytes of the event.

  • Master Pos: The position of the next event in the original master log file.

  • Flags: Event flag values.


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Document created the 26/06/2006, last modified the 26/10/2018
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