Class: BrainzLab::Instrumentation::ActiveRecord

Inherits:
Object
  • Object
show all
Defined in:
lib/brainzlab/instrumentation/active_record.rb

Constant Summary collapse

SCHEMA_QUERIES = 
%w[SCHEMA EXPLAIN].freeze
INTERNAL_TABLES = 
%w[pg_ information_schema sqlite_ mysql.].freeze
SLOW_QUERY_THRESHOLD =

Thresholds for slow query detection (in milliseconds)

100
VERY_SLOW_QUERY_THRESHOLD = 
1000
N_PLUS_ONE_THRESHOLD =

N+1 detection settings

5
N_PLUS_ONE_WINDOW =

queries to same table in single request

50

Class Method Summary collapse

Class Method Details

.install! ⇒ Object 



18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/brainzlab/instrumentation/active_record.rb', line 18

def install!
  return unless defined?(::ActiveRecord)
  return if @installed

  install_sql_subscriber!
  install_instantiation_subscriber!
  install_transaction_subscribers!
  install_strict_loading_subscriber!
  install_deprecated_association_subscriber!

  @installed = true
  BrainzLab.debug_log('ActiveRecord instrumentation installed (sql, instantiation, transactions, strict_loading)')
end

.installed? ⇒ Boolean

Returns:

  • (Boolean) 


32
33
34
 
# File 'lib/brainzlab/instrumentation/active_record.rb', line 32

def installed?
  @installed == true
end