enough with the malloc limit, not needed

app/models/admin_dashboard_data.rb

@@ -91,7 +91,7 @@ class AdminDashboardData
     ]
 
     add_problem_check :rails_env_check, :ruby_version_check, :host_names_check,
-                      :gc_checks, :ram_check, :google_oauth2_config_check,
+                      :ram_check, :google_oauth2_config_check,
                       :facebook_config_check, :twitter_config_check,
                       :github_config_check, :s3_config_check, :image_magick_check,
                       :failing_emails_check, :default_logo_check, :contact_email_check,
@@ -169,10 +169,6 @@ class AdminDashboardData
     I18n.t("dashboard.host_names_warning") if ['localhost', 'production.localhost'].include?(Discourse.current_hostname)
   end
 
-  def gc_checks
-    I18n.t("dashboard.gc_warning") if ENV['RUBY_GC_MALLOC_LIMIT'].nil?
-  end
-
   def sidekiq_check
     last_job_performed_at = Jobs.last_job_performed_at
     I18n.t('dashboard.sidekiq_warning') if Jobs.queued > 0 and (last_job_performed_at.nil? or last_job_performed_at < 2.minutes.ago)

config/deploy.rb.sample

@@ -43,7 +43,7 @@ end
 namespace :deploy do
   desc 'Start thin servers'
   task :start, :roles => :app, :except => { :no_release => true } do
-    run "cd #{current_path} && RUBY_GC_MALLOC_LIMIT=90000000 bundle exec thin -C config/thin.yml start", :pty => false
+    run "cd #{current_path} && bundle exec thin -C config/thin.yml start", :pty => false
   end
 
   desc 'Stop thin servers'
@@ -53,7 +53,7 @@ namespace :deploy do
 
   desc 'Restart thin servers'
   task :restart, :roles => :app, :except => { :no_release => true } do
-    run "cd #{current_path} && RUBY_GC_MALLOC_LIMIT=90000000 bundle exec thin -C config/thin.yml restart"
+    run "cd #{current_path} && bundle exec thin -C config/thin.yml restart"
   end
 end
 

config/discourse.config.sample

@@ -13,7 +13,6 @@ respawn limit 3 30
 start on runlevel [2345]
 stop on runlevel [06]
 
-env RUBY_GC_MALLOC_LIMIT=90000000
 env RAILS_ROOT=/var/www/discourse
 env RAILS_ENV=production
 env NUM_WEBS=4

config/unicorn_upstart.conf

@@ -23,7 +23,6 @@ exec /bin/bash <<'EOT'
   # set HOME to the setuid user's home, there doesn't seem to be a better, portable way
   export HOME="$(eval echo ~$(id -un))"
   export RAILS_ENV=production
-  export RUBY_GC_MALLOC_LIMIT=90000000
 
   cd /var/www/discourse
 

script/bench.rb

@@ -111,7 +111,6 @@ discourse_env_vars = %w(DISCOURSE_DUMP_HEAP RUBY_GC_HEAP_INIT_SLOTS RUBY_GC_HEAP
 
 if @include_env
   puts "Running with tuned environment"
-  ENV["RUBY_GC_MALLOC_LIMIT"] = "50_000_000"
   discourse_env_vars - %w(RUBY_GC_MALLOC_LIMIT).each do |v|
     ENV.delete v
   end

spec/models/admin_dashboard_data_spec.rb

@@ -70,20 +70,6 @@ describe AdminDashboardData do
     end
   end
 
-  describe 'gc_checks' do
-    subject { described_class.new.gc_checks }
-
-    it 'returns nil when gc params are set' do
-      ENV.stubs(:[]).with('RUBY_GC_MALLOC_LIMIT').returns(90000000)
-      expect(subject).to be_nil
-    end
-
-    it 'returns a string when gc params are not set' do
-      ENV.stubs(:[]).with('RUBY_GC_MALLOC_LIMIT').returns(nil)
-      expect(subject).to_not be_nil
-    end
-  end
-
   describe 'sidekiq_check' do
     subject { described_class.new.sidekiq_check }