Skip navigation links

Additional languages
12.6.2.6 SET GLOBAL SQL_SLAVE_SKIP_COUNTER Syntax »
Section Navigation      [Toggle]

12.6.2.5. RESET SLAVE Syntax

RESET SLAVE

RESET SLAVE makes the slave forget its replication position in the master's binary logs. This statement is meant to be used for a clean start: It deletes the master.info and relay-log.info files, all the relay logs, and starts a new relay log.

Note

All relay logs are deleted, even if they have not been completely executed by the slave SQL thread. (This is a condition likely to exist on a replication slave if you have issued a STOP SLAVE statement or if the slave is highly loaded.)

In MySQL 5.4 — unlike the case in MySQL 5.1 and earlier — RESET SLAVE no longer changes replication connection parameters such as master host, master port, master user, and master password. (This means that START SLAVE can be issued without requiring a CHANGE MASTER TO statement following RESET SLAVE.) However, connection parameters (which are now retained in memory even after RESET SLAVE is issued) are reset if the slave is shut down.

If the slave SQL thread was in the middle of replicating temporary tables when it was stopped, and RESET SLAVE is issued, these replicated temporary tables are deleted on the slave.


User Comments

Posted by Chris Waterson on June 28 2005 10:20pm[Delete] [Edit]

If you want to make a slave *completely* forget that it ever was a slave, then:

CHANGE MASTER TO MASTER_HOST=''

seems to do the trick.

Posted by Baron Schwartz on February 25 2008 6:24pm[Delete] [Edit]

If you run CHANGE MASTER TO MASTER_HOST='', you will not get any output from SHOW SLAVE STATUS. However, if you look in the filesystem you'll still see the master.info files, etc. If you then run RESET SLAVE, these files will be deleted.

Add your own comment.