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These scripts are somewhat rough but I needed them to help debug a memory leak we have noticed in rails 6. The biggest object script finds all the biggest objects we have in memory after boot. The test memory leak runs a very simple iteration through all multisites and observed memory.
37 lines
1009 B
Ruby
37 lines
1009 B
Ruby
# frozen_string_literal: true
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# simple script to measure largest objects in memory post boot
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if ENV['RAILS_ENV'] != "production"
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exec "RAILS_ENV=production ruby #{__FILE__}"
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end
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require 'objspace'
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ObjectSpace.trace_object_allocations do
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require File.expand_path("../../config/environment", __FILE__)
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Rails.application.routes.recognize_path('abc') rescue nil
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# load up the yaml for the localization bits, in master process
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I18n.t(:posts)
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RailsMultisite::ConnectionManagement.each_connection do
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(ActiveRecord::Base.connection.tables - %w[schema_migrations versions]).each do |table|
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table.classify.constantize.first rescue nil
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end
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end
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end
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5.times do
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GC.start(full_mark: true, immediate_sweep: true)
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end
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[String, Array, Hash].each do |klass|
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ObjectSpace.each_object(klass).sort { |a, b| b.length <=> a.length }.first(50).each do |obj|
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puts "#{klass} size: #{obj.length} #{ObjectSpace.allocation_sourcefile(obj)} #{ObjectSpace.allocation_sourceline(obj)}"
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end
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end
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