96 lines
3.2 KiB
Ruby
96 lines
3.2 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'prometheus/client/support/unicorn'
|
|
|
|
module Gitlab
|
|
module Metrics
|
|
module Samplers
|
|
class RubySampler < BaseSampler
|
|
GC_REPORT_BUCKETS = [0.005, 0.01, 0.02, 0.04, 0.07, 0.1, 0.5].freeze
|
|
|
|
def initialize(interval)
|
|
GC::Profiler.clear
|
|
|
|
metrics[:process_start_time_seconds].set(labels, Time.now.to_i)
|
|
|
|
super
|
|
end
|
|
|
|
def metrics
|
|
@metrics ||= init_metrics
|
|
end
|
|
|
|
def with_prefix(prefix, name)
|
|
"ruby_#{prefix}_#{name}".to_sym
|
|
end
|
|
|
|
def to_doc_string(name)
|
|
name.to_s.humanize
|
|
end
|
|
|
|
def labels
|
|
{}
|
|
end
|
|
|
|
def init_metrics
|
|
metrics = {
|
|
file_descriptors: ::Gitlab::Metrics.gauge(with_prefix(:file, :descriptors), 'File descriptors used', labels),
|
|
memory_bytes: ::Gitlab::Metrics.gauge(with_prefix(:memory, :bytes), 'Memory used', labels),
|
|
process_cpu_seconds_total: ::Gitlab::Metrics.gauge(with_prefix(:process, :cpu_seconds_total), 'Process CPU seconds total'),
|
|
process_max_fds: ::Gitlab::Metrics.gauge(with_prefix(:process, :max_fds), 'Process max fds'),
|
|
process_resident_memory_bytes: ::Gitlab::Metrics.gauge(with_prefix(:process, :resident_memory_bytes), 'Memory used', labels),
|
|
process_start_time_seconds: ::Gitlab::Metrics.gauge(with_prefix(:process, :start_time_seconds), 'Process start time seconds'),
|
|
sampler_duration: ::Gitlab::Metrics.counter(with_prefix(:sampler, :duration_seconds_total), 'Sampler time', labels),
|
|
gc_duration_seconds: ::Gitlab::Metrics.histogram(with_prefix(:gc, :duration_seconds), 'GC time', labels, GC_REPORT_BUCKETS)
|
|
}
|
|
|
|
GC.stat.keys.each do |key|
|
|
metrics[key] = ::Gitlab::Metrics.gauge(with_prefix(:gc_stat, key), to_doc_string(key), labels)
|
|
end
|
|
|
|
metrics
|
|
end
|
|
|
|
def sample
|
|
start_time = System.monotonic_time
|
|
|
|
metrics[:file_descriptors].set(labels, System.file_descriptor_count)
|
|
metrics[:process_cpu_seconds_total].set(labels, ::Gitlab::Metrics::System.cpu_time)
|
|
metrics[:process_max_fds].set(labels, ::Gitlab::Metrics::System.max_open_file_descriptors)
|
|
set_memory_usage_metrics
|
|
sample_gc
|
|
|
|
metrics[:sampler_duration].increment(labels, System.monotonic_time - start_time)
|
|
end
|
|
|
|
private
|
|
|
|
def sample_gc
|
|
# Observe all GC samples
|
|
sample_gc_reports.each do |report|
|
|
metrics[:gc_duration_seconds].observe(labels, report[:GC_TIME])
|
|
end
|
|
|
|
# Collect generic GC stats
|
|
GC.stat.each do |key, value|
|
|
metrics[key].set(labels, value)
|
|
end
|
|
end
|
|
|
|
def sample_gc_reports
|
|
GC::Profiler.enable
|
|
GC::Profiler.raw_data
|
|
ensure
|
|
GC::Profiler.clear
|
|
end
|
|
|
|
def set_memory_usage_metrics
|
|
memory_usage = System.memory_usage
|
|
|
|
metrics[:memory_bytes].set(labels, memory_usage)
|
|
metrics[:process_resident_memory_bytes].set(labels, memory_usage)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|