1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
# frozen_string_literal: true
module Gitlab
module Metrics
module Subscribers
# Class for tracking the total time spent in Rails cache calls
# http://guides.rubyonrails.org/active_support_instrumentation.html
class RailsCache < ActiveSupport::Subscriber
attach_to :active_support
def cache_read(event)
observe(:read, event.duration)
return unless current_transaction
return if event.payload[:super_operation] == :fetch
unless event.payload[:hit]
current_transaction.increment(:gitlab_cache_misses_total, 1) do
docstring 'Cache read miss'
end
end
end
def cache_write(event)
observe(:write, event.duration)
end
def cache_delete(event)
observe(:delete, event.duration)
end
def cache_exist?(event)
observe(:exists, event.duration)
end
def cache_fetch_hit(event)
return unless current_transaction
current_transaction.increment(:gitlab_transaction_cache_read_hit_count_total, 1)
end
def cache_generate(event)
return unless current_transaction
current_transaction.increment(:gitlab_cache_misses_total, 1) do
docstring 'Cache read miss'
end
current_transaction.increment(:gitlab_transaction_cache_read_miss_count_total, 1)
end
def observe(key, duration)
return unless current_transaction
labels = { operation: key }
current_transaction.increment(:gitlab_cache_operations_total, 1, labels) do
docstring 'Cache operations'
label_keys labels.keys
end
metric_cache_operation_duration_seconds.observe(labels, duration / 1000.0)
end
private
def current_transaction
::Gitlab::Metrics::WebTransaction.current
end
def metric_cache_operation_duration_seconds
@metric_cache_operation_duration_seconds ||= ::Gitlab::Metrics.histogram(
:gitlab_cache_operation_duration_seconds,
'Cache access time',
{},
[0.00001, 0.0001, 0.001, 0.01, 0.1, 1.0]
)
end
end
end
end
end
|
