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What is the concept of redo log in mysql
- 王林forward
- 2023-05-26 18:52:251172browse
1. Redo log is a log unique to the MySQLEngine layer and InnoDB storage engine. Also called redo log.
2. Redo log is a physical log. It can be understood as a queue with a fixed space size that will be copied cyclically.
Example
root@test:/var/lib/mysql# pwd /var/lib/mysql root@test:/var/lib/mysql# ls -lstr ib_logfile* 49152 -rw-r----- 1 mysql mysql 50331648 Dec 28 15:45 ib_logfile1 49152 -rw-r----- 1 mysql mysql 50331648 Jan 3 12:53 ib_logfile0 root@test:/var/lib/mysql# du -sh ib_logfile* 48M ib_logfile0 48M ib_logfile1 root@test:/var/lib/mysql#
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