Merge branch 'pawel/cache_feature_check_for_5_minutes_for_method_call' into 'master'
Cache feature check for 1 minute for MethodCall instrumentation toggle See merge request gitlab-org/gitlab-ce!15800
This commit is contained in:
commit
83998c0a33
2 changed files with 48 additions and 1 deletions
|
@ -1,7 +1,11 @@
|
|||
# rubocop:disable Style/ClassVars
|
||||
|
||||
module Gitlab
|
||||
module Metrics
|
||||
# Class for tracking timing information about method calls
|
||||
class MethodCall
|
||||
@@measurement_enabled_cache = Concurrent::AtomicBoolean.new(false)
|
||||
@@measurement_enabled_cache_expires_at = Concurrent::AtomicFixnum.new(Time.now.to_i)
|
||||
MUTEX = Mutex.new
|
||||
BASE_LABELS = { module: nil, method: nil }.freeze
|
||||
attr_reader :real_time, :cpu_time, :call_count, :labels
|
||||
|
@ -18,6 +22,10 @@ module Gitlab
|
|||
end
|
||||
end
|
||||
|
||||
def self.measurement_enabled_cache_expires_at
|
||||
@@measurement_enabled_cache_expires_at
|
||||
end
|
||||
|
||||
# name - The full name of the method (including namespace) such as
|
||||
# `User#sign_in`.
|
||||
#
|
||||
|
@ -72,7 +80,14 @@ module Gitlab
|
|||
end
|
||||
|
||||
def call_measurement_enabled?
|
||||
Feature.get(:prometheus_metrics_method_instrumentation).enabled?
|
||||
expires_at = @@measurement_enabled_cache_expires_at.value
|
||||
if expires_at < Time.now.to_i
|
||||
if @@measurement_enabled_cache_expires_at.compare_and_set(expires_at, 1.minute.from_now.to_i)
|
||||
@@measurement_enabled_cache.value = Feature.get(:prometheus_metrics_method_instrumentation).enabled?
|
||||
end
|
||||
end
|
||||
|
||||
@@measurement_enabled_cache.value
|
||||
end
|
||||
end
|
||||
end
|
||||
|
|
|
@ -20,9 +20,39 @@ describe Gitlab::Metrics::MethodCall do
|
|||
|
||||
context 'prometheus instrumentation is enabled' do
|
||||
before do
|
||||
allow(Feature.get(:prometheus_metrics_method_instrumentation)).to receive(:enabled?).and_call_original
|
||||
described_class.measurement_enabled_cache_expires_at.value = Time.now.to_i - 1
|
||||
Feature.get(:prometheus_metrics_method_instrumentation).enable
|
||||
end
|
||||
|
||||
around do |example|
|
||||
Timecop.freeze do
|
||||
example.run
|
||||
end
|
||||
end
|
||||
|
||||
it 'caches subsequent invocations of feature check' do
|
||||
10.times do
|
||||
method_call.measure { 'foo' }
|
||||
end
|
||||
|
||||
expect(Feature.get(:prometheus_metrics_method_instrumentation)).to have_received(:enabled?).once
|
||||
end
|
||||
|
||||
it 'expires feature check cache after 1 minute' do
|
||||
method_call.measure { 'foo' }
|
||||
|
||||
Timecop.travel(1.minute.from_now) do
|
||||
method_call.measure { 'foo' }
|
||||
end
|
||||
|
||||
Timecop.travel(1.minute.from_now + 1.second) do
|
||||
method_call.measure { 'foo' }
|
||||
end
|
||||
|
||||
expect(Feature.get(:prometheus_metrics_method_instrumentation)).to have_received(:enabled?).twice
|
||||
end
|
||||
|
||||
it 'observes the performance of the supplied block' do
|
||||
expect(described_class.call_duration_histogram)
|
||||
.to receive(:observe)
|
||||
|
@ -34,6 +64,8 @@ describe Gitlab::Metrics::MethodCall do
|
|||
|
||||
context 'prometheus instrumentation is disabled' do
|
||||
before do
|
||||
described_class.measurement_enabled_cache_expires_at.value = Time.now.to_i - 1
|
||||
|
||||
Feature.get(:prometheus_metrics_method_instrumentation).disable
|
||||
end
|
||||
|
||||
|
|
Loading…
Reference in a new issue