There may be times where you will have to adjust the size of MySQL InnoDB log files to increase performance and stability, but take caution when you do, otherwise you will end up in a world of hurt. If you change the size of the log file and attempt to restart and get a “InnoDB: Error: log file ./ib_logfile0 is of different size 0 5242880 bytes” error message, you will need to follow the steps outlined @ http://www.mysqlperformanceblog.com/2011/07/09/how-to-change-innodb_log_file_size-safely/ to ensure no data loss or corruption.