Mysql 5.5 Defragmentation not reducing the fragmentation percent

view full story

http://serverfault.com – We are running OPTIMIZE TABLE , but not seeing any fragmentation reduction. They are as high as 120% to 200%. Am calculating the fragmentation % using this: Data_Free / (Data_Length + Index_Length) My tables are using INNODB engine and "innodb_file_per_table" set to 1. What am I missing? Has something change with Mysql 5.5+ onwards? TIA (HowTos)