This is the second day and it won’t start at all now. Once I think it revived after restarting the machine. Once I think the DB check passed and it started. This crashing thing has happened often, three times in two days. It was not shut down uncleanly (but at least once it was). To ensure your data is safe several checks need to be performed.” “eM Client was not closed correctly the last time.
InnoDB checks for corrupted pages by performing checksums on every page it reads, and if it finds a checksum discrepancy it will automatically stop the MySQL server. InnoDB is the default storage engine in MySQL as of version 5.5, and it features automated corruption checking and repair operations. On the other hand, if the corrupted table uses the InnoDB storage engine, then the process for repairing it will be different. If the table is still corrupted, though, the MySQL documentation suggests a few alternative methods for repairing corrupted tables. If the MyISAM table is indeed corrupted, it can usually be repaired by issuing a REPAIR TABLE statement:Īssuming the repair was successful, you will see a message like the following in your output: If the table uses the MyISAM storage engine, you can check whether it’s corrupted by running a CHECK TABLE statement from the MySQL prompt:Ī message will appear in this statement’s output letting you know whether or not it’s corrupted.
There’s a software bug somewhere in the MySQL code.An external program modifies a table that’s simultaneously being modified by the server.The MySQL server stops in middle of a write.Some common causes of corrupted tables are:
Attempts to read from a corrupted table will usually lead to the server crashing. Occasionally, MySQL tables can become corrupted, meaning that an error has occurred and the data held within them is unreadable.