ibdata1 size huge
my ibdata1-file got 4GB big in size. Now I have truncated the history-table to cleanup, but ibdata1 keeps at the same size (phpmyadmin shows "InnoDB free: 4171776 kB").
Since I am not familiar with innodb, I can only guess that innodb allocates disk space once, extending automatically, but not "contracting" automatically.
Is there a way, I can tell innodb to free that disk space not used?