The EntityPersister is invalidating the secondary cache when doing an update with dynamic update set to true.

It is in the following method:

public boolean isCacheInvalidationRequired() {
return hasFormulaProperties || ( !isVersioned() && useDynamicUpdate() );
}

Is there any reason why dynamic updates must invalidate the Cache? Or can I implement my own persister that doesn't do this?

Pete.

think about what happens when two concurrent dynamic updates occur with nonversioned data.

This functionality is, of course, very correct.