long newsize = 4 * 1024 * 1024; bibleHelper.showErrorLog(" the New Size-->" + newsize); VMRuntime heap = VMRuntime.getRuntime(); bibleHelper.showErrorLog("cur Alocate -->"+ heap.getTargetHeapUtilization()); long oldSize = heap.setMinimumHeapSize(newsize); bibleHelper.showErrorLog("After New Size -->"+ heap.getTargetHeapUtilization());