5679ee0120
This gives a very rough estimate of how much memory is allocated during a transaction. This only works reliably when using a single-threaded application server and a Ruby implementation with a GIL as otherwise memory allocated by other threads might skew the statistics. Sadly there's no way around this as Ruby doesn't provide a reliable way of gathering accurate object sizes upon allocation on a per-thread basis.
103 lines
2.1 KiB
Ruby
103 lines
2.1 KiB
Ruby
module Gitlab
|
|
module Metrics
|
|
# Class for storing metrics information of a single transaction.
|
|
class Transaction
|
|
THREAD_KEY = :_gitlab_metrics_transaction
|
|
|
|
attr_reader :tags, :values
|
|
|
|
attr_accessor :action
|
|
|
|
def self.current
|
|
Thread.current[THREAD_KEY]
|
|
end
|
|
|
|
# action - A String describing the action performed, usually the class
|
|
# plus method name.
|
|
def initialize(action = nil)
|
|
@metrics = []
|
|
|
|
@started_at = nil
|
|
@finished_at = nil
|
|
|
|
@values = Hash.new(0)
|
|
@tags = {}
|
|
@action = action
|
|
|
|
@memory_before = 0
|
|
@memory_after = 0
|
|
end
|
|
|
|
def duration
|
|
@finished_at ? (@finished_at - @started_at) * 1000.0 : 0.0
|
|
end
|
|
|
|
def allocated_memory
|
|
@memory_after - @memory_before
|
|
end
|
|
|
|
def run
|
|
Thread.current[THREAD_KEY] = self
|
|
|
|
@memory_before = System.memory_usage
|
|
@started_at = Time.now
|
|
|
|
yield
|
|
ensure
|
|
@memory_after = System.memory_usage
|
|
@finished_at = Time.now
|
|
|
|
Thread.current[THREAD_KEY] = nil
|
|
end
|
|
|
|
def add_metric(series, values, tags = {})
|
|
prefix = sidekiq? ? 'sidekiq_' : 'rails_'
|
|
|
|
@metrics << Metric.new("#{prefix}#{series}", values, tags)
|
|
end
|
|
|
|
def increment(name, value)
|
|
@values[name] += value
|
|
end
|
|
|
|
def set(name, value)
|
|
@values[name] = value
|
|
end
|
|
|
|
def add_tag(key, value)
|
|
@tags[key] = value
|
|
end
|
|
|
|
def finish
|
|
track_self
|
|
submit
|
|
end
|
|
|
|
def track_self
|
|
values = { duration: duration, allocated_memory: allocated_memory }
|
|
|
|
@values.each do |name, value|
|
|
values[name] = value
|
|
end
|
|
|
|
add_metric('transactions', values, @tags)
|
|
end
|
|
|
|
def submit
|
|
metrics = @metrics.map do |metric|
|
|
hash = metric.to_hash
|
|
|
|
hash[:tags][:action] ||= @action if @action
|
|
|
|
hash
|
|
end
|
|
|
|
Metrics.submit_metrics(metrics)
|
|
end
|
|
|
|
def sidekiq?
|
|
Sidekiq.server?
|
|
end
|
|
end
|
|
end
|
|
end
|