Starting MySQL 5.5, InnoDB becomes the default storage engine replacing MyISAM. There are many performance improvements in this release. In particular, crash recovery, the automatic process that makes all data consistent when the database is restarted, is fast and reliable. (Now much much faster than long-time InnoDB users are used to.) The bigger the database, the more dramatic the speedup.
Tweaking and optimizing your MySQL database server is quite subjective, with a lot of conditions and variables need to consider. Following settings might help you improve and delivering the great InnoDB database by putting the specific value in my.cnf of your server:
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