정확히는 안드로이드입니다.

dalvik.vm.heapstartsize=5m

This is converted to a -Xms option for Dalvik. It specifies the initial size of the managed heap.

dalvik.vm.heapsize=128m

This is converted to a -Xmx option for Dalvik. It specifies the maximum size of the managed heap.

dalvik.vm.heapgrowthlimit=48m

This converts to a -XX:HeapGrowthLimit option. It specifies the maximum size of a "standard" app's heap. If the app uses android:largeHeap in its manifest, it uses the full heapsize value instead.

dalvik.vm.heaptargetutilization=0.75

This converts to a -XX:HeapTargetUtilization option. It gives the VM a hint as to how full the managed heap should be allowed to become.

dalvik.vm.heapminfree=512kdalvik.vm.heapmaxfree=2m

These converts to -XX:HeapMinFree and -XX:HeapMaxFree, respectively. These are used in conjunction with the the XX:HeapTargetUtilization to determine how much to grow the heap when the heap needs to grow.

이 문장들이 해석이 되지 않아서(정확히는 dalvik.vm.heaptargetutilization부터 이해가 안 갑니다)

힙에 대해서 알고 싶은데, 스택이라는 개념까지 알아야 하는 것 같더라구요.

자세히 설명되어 있는 곳을 알고 싶습니다.