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Diffstat (limited to 'lib/gitlab/metrics/sampler.rb')
-rw-r--r-- | lib/gitlab/metrics/sampler.rb | 133 |
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 |