title: query on properties in /system/build.prop
body: <p>Could some one please explain me regarding the below properties in build.prop,</p>
  
  <pre><code>dalvik.vm.heapstartsize=5m
  dalvik.vm.heapgrowthlimit=48m
  dalvik.vm.heapsize=128m
  dalvik.vm.heaptargetutilization=0.75
  dalvik.vm.heapminfree=512k
  dalvik.vm.heapmaxfree=2m
  </code></pre>
  
  <p>Thanks for your help.</p>