83 lines
2.2 KiB
Ruby
83 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Metrics
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module Subscribers
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# Class for tracking the total time spent in Rails cache calls
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# http://guides.rubyonrails.org/active_support_instrumentation.html
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class RailsCache < ActiveSupport::Subscriber
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attach_to :active_support
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def cache_read(event)
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observe(:read, event.duration)
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return unless current_transaction
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return if event.payload[:super_operation] == :fetch
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unless event.payload[:hit]
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current_transaction.increment(:gitlab_cache_misses_total, 1) do
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docstring 'Cache read miss'
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end
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end
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end
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def cache_write(event)
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observe(:write, event.duration)
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end
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def cache_delete(event)
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observe(:delete, event.duration)
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end
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def cache_exist?(event)
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observe(:exists, event.duration)
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end
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def cache_fetch_hit(event)
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return unless current_transaction
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current_transaction.increment(:gitlab_transaction_cache_read_hit_count_total, 1)
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end
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def cache_generate(event)
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return unless current_transaction
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current_transaction.increment(:gitlab_cache_misses_total, 1) do
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docstring 'Cache read miss'
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end
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current_transaction.increment(:gitlab_transaction_cache_read_miss_count_total, 1)
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end
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def observe(key, duration)
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return unless current_transaction
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labels = { operation: key }
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current_transaction.increment(:gitlab_cache_operations_total, 1, labels) do
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docstring 'Cache operations'
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label_keys labels.keys
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end
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metric_cache_operation_duration_seconds.observe(labels, duration / 1000.0)
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end
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private
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def current_transaction
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::Gitlab::Metrics::WebTransaction.current
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end
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def metric_cache_operation_duration_seconds
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@metric_cache_operation_duration_seconds ||= ::Gitlab::Metrics.histogram(
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:gitlab_cache_operation_duration_seconds,
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'Cache access time',
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{},
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[0.00001, 0.0001, 0.001, 0.01, 0.1, 1.0]
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)
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end
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end
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end
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end
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end
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