java_heap_stats {
  instance_stats {
    upid: 2
    process {
      name: "system_server"
      uid: 1000
    }
    samples {
      ts: 10
      heap_size: 992
      reachable_heap_size: 352
      obj_count: 6
      reachable_obj_count: 3
      anon_rss_and_swap_size: 4096000
    }
  }
}