[Paraview] ParaView/Xdmf bad memory usage

[Renato N. Elias]

There's something wrong with memory allocation employed by ParaView 
(3.4.0) OR Xdmf library. When I load a temporal collection of spatial 
collections it seems that ParaView (or Xdmf) is trying to allocate 
memory for all time steps at once as it were a multiblock of 
multiblocks. My guess is that each time step should be loaded when 
required AND after unloading the previous time step in order to release 
some memory. Is there any workaround for this problem or it was really 
designed to work in this way?

Regards

Renato.

p.s.: I can provide a large dataset (40M tets/128 cpus/15 time steps) 
for debugging purposes.
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