pt-online-schema-change has not optimized my mysql table


I understand that with that pt-online-schema-change tool you can optimize your mysql table, but I used it with one table after deleting colums from this table, but I don’t won any free space…

The table has 41G space and deleting columns I had calculated gain 11G space, but using this tool I still with 41G…

This is the command that I used:

pt-online-schema-change --alter “ENGINE=InnoDB” D=my_database,t=mytable --max-lag=30000 Threads_running=100 --execute

More información:

I’m using Percona-server-5.5

Any suggestion?

Thank you!

did u check the free space from information_schema.tables table?