To use ‘ innodb_force_recovery’ option, follow these steps: In such a case, forcing InnoDB recovery may help start up MySQL. If database corruption is severe, you will likely face trouble while starting your MySQL Server. Read this: How to Repair MySQL Database Table Without Downtime? For this, use the CHECK TABLE statement to check the tables that are corrupt. If InnoDB is MySQL Server’s default storage engine, in some cases of database corruption, merely dumping, dropping and re-creating one or a few corrupt tables will work for you. NOTE: If MySQL Server uses MyISAM as the default storage engine, skip to Step 3 to know the process of repairing the corrupt db. Step 2 – Bring Database Back in Recovery Mode To back up all of the db files, follow these steps: Step 1 – Backup Your Databaseīefore attempting to repair the corrupt database, make sure to back up your database files first.Īlthough the db is already corrupt, backing it up will help minimize the risk of further damage, which may be caused due to a recovery operation. If there is no backup, using a specialized MySQL repair software may help. But, if MySQL service stops running (has crashed) and you cannot log into the MySQL command-line client, the only option left is to restore the database from a good known backup. NOTE: These steps will work only if the MySQL database server is running. Try resolving database corruption by following steps in the sequence listed below: Troubleshooting Steps to Resolve MySQL Database Corruption But if you don’t have the backup, performing recovery operations can help fix MySQL database corruption.Įven if backup is available, attempting recovery can be a better option as it takes less time in getting back the db online. Usually, when MySQL database corrupted, it is recommended that you restore it from the last known good backup copy. What to do When MySQL Database Gets Corrupt? That’s because MyISAM tables are more susceptible to corruption. Users trying to move database files manually in MySQL data directory (or datadir).īesides these reasons, db corruption also depends on whether you’re using MyISAM or InnoDB storage engine.Third-party software to access the database crashes unexpectedly.MySQL process gets killed in the middle of writing to the disk.What Causes Database Corruption in MySQL Server?įollowing are some of the common reasons behind MySQL corruption: Unfortunately, you might not even notice that your MySQL server has turned corrupt, until the server accesses a corrupt table or the server is shutdown. What to do When MySQL Database Gets Corrupt?ĭatabase corruption in MySQL Server, if not handled properly or resolved in time, can lead to major downtime and data loss. What Causes Database Corruption in MySQL Server?.
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