Recently I've updated my Nexus5 to android L . I don't even have many apps on my phone . But, to my surprise my N5 is facing many hiccups(the one that happened never on my phone) . I'm really worried about this . I thought update would change my runtime from dalvik to art and it obviously consumes more ram . But recently my free ram is not exceeding 450-500mb . Is there a way to get out my N5 from this critical stage??