Repair mysql Tables using Mysqlcheck

This happened when my cacti crashed after a power failure.

Repair a table inside database

This will repair host table in cacti databse

# mysqlcheck -r cacti host -u root -p

The following checks, optimizes and repairs all the corrupted table in cacti database.

# mysqlcheck -u root -p --auto-repair -c -o cacti

To check all the tables and all the databases use the “–all-databases” along with -c option as shown below.

# mysqlcheck -c  -u root -p --all-databases
Enter password:

The following are some of the key options that you can use along with mysqlcheck.

-A, –all-databases Consider all the databases
-a, –analyze Analyze tables
-1, –all-in-1 Use one query per database with tables listed in a comma separated way
–auto-repair Repair the table automatically it if is corrupted
-c, –check Check table errors
-C, –check-only-changed Check tables that are changed since last check
-g, –check-upgrade Check for version dependent changes in the tables
-B, –databases Check more than one databases
-F, –fast Check tables that are not closed properly
–fix-db-names Fix DB names
–fix-table-names Fix table names
-f, –force Continue even when there is an error
-e, –extended Perform extended check on a table. This will take a long time to execute.
-m, –medium-check Faster than extended check option, but does most checks
-o, –optimize Optimize tables
-q, –quick Faster than medium check option
-r, –repair Fix the table corruption