Class: Barnes::Instruments::RubyGC

Inherits:
Object
  • Object
show all
Defined in:
lib/barnes/instruments/ruby_gc.rb

Constant Summary collapse

COUNTERS =

Both sets are delta-computed (cur - last), but they land in different reporting buckets. COUNTERS go to ‘counters` (accumulated totals the receiver can sum). GAUGE_COUNTERS go to `gauges` so each sample is a standalone per-interval value. Keeping them separate also excludes them from the raw-value gauge loop below.

{
:count => :'GC.count',
:major_gc_count => :'GC.major_count',
:minor_gc_count => :'GC.minor_gc_count' }
GAUGE_COUNTERS = 
{
  :total_allocated_objects => :'GC.total_allocated_objects',
  :total_freed_objects => :'GC.total_freed_objects'
}

Instance Method Summary collapse

Instance Method Details

#instrument!(state, counters, gauges) ⇒ Object 



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# File 'lib/barnes/instruments/ruby_gc.rb', line 23

def instrument!(state, counters, gauges)
  last = state[:ruby_gc]
  cur = state[:ruby_gc] = GC.stat

  COUNTERS.each do |stat, metric|
    counters[metric] = cur[stat] - last[stat] if cur.include? stat
  end

  GAUGE_COUNTERS.each do |stat, metric|
    gauges[metric] = cur[stat] - last[stat] if cur.include? stat
  end

  cur.each do |k, v|
    unless GAUGE_COUNTERS.include? k
      gauges[:"GC.#{k}"] = v
    end
  end
end

#start!(state) ⇒ Object 



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# File 'lib/barnes/instruments/ruby_gc.rb', line 19

def start!(state)
  state[:ruby_gc] = GC.stat
end