1 files changed, 0 insertions, 133 deletions
diff --git a/lib/gitlab/metrics/sampler.rb b/lib/gitlab/metrics/sampler.rb
deleted file mode 100644
index 0000450d9bb..00000000000
--- a/lib/gitlab/metrics/sampler.rb
+++ /dev/null
@@ -1,133 +0,0 @@
-module Gitlab
-  module Metrics
-    # Class that sends certain metrics to InfluxDB at a specific interval.
-    #
-    # This class is used to gather statistics that can't be directly associated
-    # with a transaction such as system memory usage, garbage collection
-    # statistics, etc.
-    class Sampler
-      # interval - The sampling interval in seconds.
-      def initialize(interval = Metrics.settings[:sample_interval])
-        interval_half = interval.to_f / 2
-
-        @interval       = interval
-        @interval_steps = (-interval_half..interval_half).step(0.1).to_a
-        @last_step      = nil
-
-        @metrics = []
-
-        @last_minor_gc = Delta.new(GC.stat[:minor_gc_count])
-        @last_major_gc = Delta.new(GC.stat[:major_gc_count])
-
-        if Gitlab::Metrics.mri?
-          require 'allocations'
-
-          Allocations.start
-        end
-      end
-
-      def start
-        Thread.new do
-          Thread.current.abort_on_exception = true
-
-          loop do
-            sleep(sleep_interval)
-
-            sample
-          end
-        end
-      end
-
-      def sample
-        sample_memory_usage
-        sample_file_descriptors
-        sample_objects
-        sample_gc
-
-        flush
-      ensure
-        GC::Profiler.clear
-        @metrics.clear
-      end
-
-      def flush
-        Metrics.submit_metrics(@metrics.map(&:to_hash))
-      end
-
-      def sample_memory_usage
-        add_metric('memory_usage', value: System.memory_usage)
-      end
-
-      def sample_file_descriptors
-        add_metric('file_descriptors', value: System.file_descriptor_count)
-      end
-
-      if Metrics.mri?
-        def sample_objects
-          sample = Allocations.to_hash
-          counts = sample.each_with_object({}) do |(klass, count), hash|
-            name = klass.name
-
-            next unless name
-
-            hash[name] = count
-          end
-
-          # Symbols aren't allocated so we'll need to add those manually.
-          counts['Symbol'] = Symbol.all_symbols.length
-
-          counts.each do |name, count|
-            add_metric('object_counts', { count: count }, type: name)
-          end
-        end
-      else
-        def sample_objects
-        end
-      end
-
-      def sample_gc
-        time  = GC::Profiler.total_time * 1000.0
-        stats = GC.stat.merge(total_time: time)
-
-        # We want the difference of GC runs compared to the last sample, not the
-        # total amount since the process started.
-        stats[:minor_gc_count] =
-          @last_minor_gc.compared_with(stats[:minor_gc_count])
-
-        stats[:major_gc_count] =
-          @last_major_gc.compared_with(stats[:major_gc_count])
-
-        stats[:count] = stats[:minor_gc_count] + stats[:major_gc_count]
-
-        add_metric('gc_statistics', stats)
-      end
-
-      def add_metric(series, values, tags = {})
-        prefix = sidekiq? ? 'sidekiq_' : 'rails_'
-
-        @metrics << Metric.new("#{prefix}#{series}", values, tags)
-      end
-
-      def sidekiq?
-        Sidekiq.server?
-      end
-
-      # Returns the sleep interval with a random adjustment.
-      #
-      # The random adjustment is put in place to ensure we:
-      #
-      # 1. Don't generate samples at the exact same interval every time (thus
-      #    potentially missing anything that happens in between samples).
-      # 2. Don't sample data at the same interval two times in a row.
-      def sleep_interval
-        while step = @interval_steps.sample
-          if step != @last_step
-            @last_step = step
-
-            return @interval + @last_step
-          end
-        end
-      end
-    end
-  end
-end