107 lines
2.9 KiB
Ruby
107 lines
2.9 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Metrics
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include Gitlab::Metrics::Prometheus
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include Gitlab::Metrics::Methods
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EXECUTION_MEASUREMENT_BUCKETS = [0.001, 0.01, 0.1, 1].freeze
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@error = false
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def self.enabled?
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prometheus_metrics_enabled?
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end
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def self.error?
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@error
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end
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# Tracks an event.
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#
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# See `Gitlab::Metrics::Transaction#add_event` for more details.
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def self.add_event(*args)
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current_transaction&.add_event(*args)
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end
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# Allow access from other metrics related middlewares
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def self.current_transaction
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Transaction.current
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end
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# Returns the prefix to use for the name of a series.
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def self.series_prefix
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@series_prefix ||= Gitlab::Runtime.sidekiq? ? 'sidekiq_' : 'rails_'
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end
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def self.settings
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@settings ||= begin
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current_settings = Gitlab::CurrentSettings.current_application_settings
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{
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method_call_threshold: current_settings[:metrics_method_call_threshold]
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}
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end
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end
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def self.method_call_threshold
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# This is memoized since this method is called for every instrumented
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# method. Loading data from an external cache on every method call slows
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# things down too much.
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# in milliseconds
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@method_call_threshold ||= settings[:method_call_threshold]
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end
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# Measures the execution time of a block.
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#
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# Example:
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#
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# Gitlab::Metrics.measure(:find_by_username_duration) do
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# UserFinder.new(some_username).find_by_username
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# end
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#
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# name - The name of the field to store the execution time in.
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#
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# Returns the value yielded by the supplied block.
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def self.measure(name)
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trans = current_transaction
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return yield unless trans
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real_start = System.monotonic_time
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cpu_start = System.cpu_time
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retval = yield
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cpu_stop = System.cpu_time
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real_stop = System.monotonic_time
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real_time = (real_stop - real_start)
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cpu_time = cpu_stop - cpu_start
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real_duration_seconds = fetch_histogram("gitlab_#{name}_real_duration_seconds".to_sym) do
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docstring "Measure #{name}"
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base_labels Transaction::BASE_LABELS
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buckets EXECUTION_MEASUREMENT_BUCKETS
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end
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real_duration_seconds.observe(trans.labels, real_time)
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cpu_duration_seconds = fetch_histogram("gitlab_#{name}_cpu_duration_seconds".to_sym) do
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docstring "Measure #{name}"
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base_labels Transaction::BASE_LABELS
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buckets EXECUTION_MEASUREMENT_BUCKETS
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with_feature "prometheus_metrics_measure_#{name}_cpu_duration"
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end
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cpu_duration_seconds.observe(trans.labels, cpu_time)
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trans.increment("#{name}_real_time", real_time.in_milliseconds, false)
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trans.increment("#{name}_cpu_time", cpu_time.in_milliseconds, false)
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trans.increment("#{name}_call_count", 1, false)
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retval
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end
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end
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end
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