Unusual memory usage

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Hi I have an unusual memory usage in production environment.
Here is what’s happen:
Couple of days ago facing this chart, after i down/up jboss memory usage back to normal but after a while increasing, so i should down/up again.
Mem

Try to get hprof, gc.log, jboss log,...
Gc.log

Dump1

Dump2

Dump4

Eclipse MAT
Mta

Any idea?
Thanks