This blog discusses how TokuDB impacts InnoDB performance when the two run in the same environment.
You would think MySQL storage engines are fairly independent of each other, even in the same environment. Enabling one, or changing its configuration, logically should have no impact on the performance of other engines (such as InnoDB) when they are accessing tables. The reality, however, is more complicated than that!
Now that we’ve shipped TokuDB, we’ve been getting feedback from our community and customers that enabling TokuDB might negatively affect performance – even for queries that don’t touch TokuDB tables (and in some cases, even when TokuDB is kept completely idle).
…[Read more]