11g Memory Profiler: ADF BC 2 AppModuleImpls and 2 ViewObjectImpls?

Question

I'm currently playing with the Memory Profiler under JDev11g 11.1.1.2.0, and I'm seeing some unexplained behavior on the number of AppModuleImpl + ViewObjectImpls created.
To replicate I've built a very simple application:
1) A single EO
2) A single updateable VO based on the EO
3) An AM with the VO exposed
4) A single ADF Faces RC Forms page based on the VO
5) The relevant pageDef file with the iterator and attribute bindings
6) The relevant DataBinding.cpx file with the pageDef reference + the single DataControl mapping back to AM using the config AppModuleLocal
I've done absolutely nothing tricky in terms of the setup, taking all default values. At runtime when the page is invoked, I can see in the Memory Profiler that:
a) 25 EntityImpl's are created for my relating EO - this is expected as it's the rangesize determined by the iterator the pageDef
b) 25 ViewRowImpl's reflecting the rows retrieved by the VO
but oddly:
c) 2 AppModuleImpl's, where I'd expect one (by 2 I mean the Size column in the Memory Profiler shows 2, as well as the Final and Balance columns)
d) 2 ViewObjectImpl's, where I'd expect one
...and slightly more strange, I can see the constructor for the AppModuleImpl called only once?
I'll take a bet this is something to do with the AM pool settings, but the fact that I can't see the AppModuleImpl constructor called twice (only once) leaves me to think there's something else going on.
Could somebody assist me in understanding why I'm seeing the above behavior please?
(Post edit: I should also mention we're talking about a single user request here, not multiple users).
Cheers,
CM.

Answer 1

Boing.