class ElasticAPM::Metrics::VMSet

def collect
  read!
  super
end

def read!
  return if disabled?
  stat = GC.stat
  gauge(:'ruby.gc.count').value = stat[:count]
  gauge(:'ruby.threads').value = Thread.list.count
  gauge(:'ruby.heap.slots.live').value = stat[:heap_live_slots]
  gauge(:'ruby.heap.slots.free').value = stat[:heap_free_slots]
  gauge(:'ruby.heap.allocations.total').value =
    stat[:total_allocated_objects]
  return unless GC::Profiler.enabled?
  @total_time ||= 0
  @total_time += GC::Profiler.total_time
  GC::Profiler.clear
  gauge(:'ruby.gc.time').value = @total_time
rescue TypeError => e
  error 'VM metrics encountered error: %s', e
  debug('Backtrace:') { e.backtrace.join("\n") }
  disable!
end