That's 11 GB of database you have. Does it only include InnoDB data and indexes, then you should only have about buffer size accordingly. Most of the times buffer pool size should not fit your data size. Many tables are inactive, like backup tables lying around. Please check your complete database size including inactive components. For MySQL buffer size you can check this post, try tuning for improved performance. If nothing works, run MySQL Database recovery tool, free download is available for the preview of repaired database.
