Recently I upgraded the MySQL server and I enabled InnoDB and then I was not able to start the MySQL Server.

The next step was to check the mysql logs and I saw the error:

InnoDB: Error: log file ./ib_logfile0 is of different size 0 5256780 bytes
InnoDB: than specified in the .cnf file 0 1077645824 bytes!
[ERROR] Plugin ‘InnoDB’ init function returned error.
[ERROR] Plugin ‘InnoDB’ registration as a STORAGE ENGINE failed.
[ERROR] Unknown/unsupported storage engine: InnoDB
[ERROR] Aborting

The solution for this error is:

Remove the ib_logfile0 and ib_logfile1 files located in /var/lib/mysql.

rm /var/lib/mysql/ib_logfile0
rm /var/lib/mysql/ib_logfile1 Continue Reading...

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