How to fix InnoDB database corruption error?

Check the log files. If you find InnoDB database corruption, follow the below mentioned steps:

Take a backup or mysql directory, which can be used to restore if anything goes wrong.

# cd /var/lib/

# tar -cxvf mysql.tar.gz mysql

//Stop mysql service
# /etc/init.d/mysql stop

Add the following line into /etc/my.cnf to make mysql read only
innodb_force_recovery = 4

Restart mysqld - Mysql will start as we have started in read only mode

//Take backup of all databases using mysqldump
# mysqldump -A > alltable.sql

Drop all databases which are corrupted

Database can be deleted by deleting related directory in /var/lib/mysql/ or from mysql command-line or from phpmyadmin

#mysql -u root -p

# DROP ;

//We can check available database using this command
# show databases;

//Stop mysql service
# service mysql stop

//Remove innodb log and data file
# rm -rf /var/lib/mysql/ib*

Remove or comment out innodb_force_recovery in /etc/my.cnf

//Start mysql sevice in read-write mode
# service mysql start

//Restore database from backup that we have taken
# mysql -u root -p dbname < alldb.sql


After restoring DB restart mysql. We have fixed the issue, if MySQL is able to restart successfully. If still issue persists, you will need to restore database from older backup.


Related Articles

How to edit the my.cnf file of MySQL in Linux VPS?

Linux VPS and Dedicated server customers can edit MySQL configuration settings by modifying...

How do I connect MySQL database via MySQL Workbench?

MySQL Workbench is the excellent MySQL client tool used to connect to remote MySQL database from...

How to check MYSQL Database size in phpMyAdmin and via command?

Sometimes it is required to check the MySQL Database size. You can check it from the phpMyAdmin...

How to check active MS-SQL connections?

Following are the steps to check active database connection in the MS SQL server please follow...

How to Repair MDF Files in SQL Server Database?

Important Note :  Before proceed to following steps, we strongly advise taking your database...

  • 0 Users Found This Useful

Was this answer helpful?