diff options
Diffstat (limited to 'lib/gitlab/metrics/sampler.rb')
| -rw-r--r-- | lib/gitlab/metrics/sampler.rb | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/lib/gitlab/metrics/sampler.rb b/lib/gitlab/metrics/sampler.rb index 1ea425bc904..fc709222a9b 100644 --- a/lib/gitlab/metrics/sampler.rb +++ b/lib/gitlab/metrics/sampler.rb @@ -7,9 +7,14 @@ module Gitlab # statistics, etc. class Sampler # interval - The sampling interval in seconds. - def initialize(interval = 15) - @interval = interval - @metrics = [] + def initialize(interval = Metrics.settings[:sample_interval]) + interval_half = interval.to_f / 2 + + @interval = interval + @interval_steps = (-interval_half..interval_half).step(0.1).to_a + @last_step = nil + + @metrics = [] @last_minor_gc = Delta.new(GC.stat[:minor_gc_count]) @last_major_gc = Delta.new(GC.stat[:major_gc_count]) @@ -26,7 +31,7 @@ module Gitlab Thread.current.abort_on_exception = true loop do - sleep(@interval) + sleep(sleep_interval) sample end @@ -102,6 +107,23 @@ module Gitlab def sidekiq? Sidekiq.server? end + + # Returns the sleep interval with a random adjustment. + # + # The random adjustment is put in place to ensure we: + # + # 1. Don't generate samples at the exact same interval every time (thus + # potentially missing anything that happens in between samples). + # 2. Don't sample data at the same interval two times in a row. + def sleep_interval + while step = @interval_steps.sample + if step != @last_step + @last_step = step + + return @interval + @last_step + end + end + end end end end |