Setting maximum results' number via FEM

I am running some queries via FileNet API (Java), but I always obtain exactly 20.000 results. I suspect that there is a limit in the number of returned results by default. Is there a way to change it via FEM, if that is the case? I searched through the properties of the Object Store, but I found nothing.

Solution

This is controlled by the QueryCountMaxSize and QueryCountDefaultSize configuration properties of the Server Cache subsystem. It is configurable on the domain level (root node in FEM):