[quote]I create always increases as the job procedes, as if it is resizing to some maximum and never getting shrunk back down when I call MyAnalysisEvent::Clear(), which callls the Clear method of TClonesArray.
[/quote]This is the intent of the TClonesArray. The goal is to minimize the number of memory allocation/deallocation. So the size should grow up to the maximum number of element in any of the events.
Cheers.
Philippe.