diff --git a/app/models/admin_dashboard_data.rb b/app/models/admin_dashboard_data.rb
index 452c7622593..ce5cf9a5ff7 100644
--- a/app/models/admin_dashboard_data.rb
+++ b/app/models/admin_dashboard_data.rb
@@ -40,7 +40,7 @@ class AdminDashboardData
   end
 
   def problems
-    [rails_env_check, host_names_check, gc_checks, sidekiq_check || clockwork_check, ram_check, facebook_config_check, twitter_config_check, github_config_check].compact
+    [rails_env_check, host_names_check, gc_checks, sidekiq_check || queue_size_check || clockwork_check, ram_check, facebook_config_check, twitter_config_check, github_config_check].compact
   end
 
   def rails_env_check
@@ -64,6 +64,11 @@ class AdminDashboardData
     I18n.t('dashboard.clockwork_warning') unless Jobs::ClockworkHeartbeat.is_clockwork_running?
   end
 
+  def queue_size_check
+    queue_size = Jobs.queued
+    I18n.t('dashboard.queue_size_warning', queue_size: queue_size) unless queue_size < 100
+  end
+
   def ram_check
     I18n.t('dashboard.memory_warning') if MemInfo.new.mem_total and MemInfo.new.mem_total < 1_000_000
   end
diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 6c4350ec263..2e8525b0a39 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -341,6 +341,7 @@ en:
     gc_warning: 'Your server is using default ruby garbage collection parameters, which will not give you the best performance. Read this topic on performance tuning: <a href="http://meta.discourse.org/t/tuning-ruby-and-rails-for-discourse/4126">Tuning Ruby and Rails for Discourse</a>.'
     clockwork_warning: 'Clockwork is not running. Ensure that a clockwork process is always running so that important jobs can be scheduled. <a href="https://github.com/tomykaira/clockwork">Learn about clockwork here</a>.'
     sidekiq_warning: 'Sidekiq is not running. Many tasks, like sending emails, are executed asynchronously by sidekiq. Please ensure at least one sidekiq process is running. <a href="https://github.com/mperham/sidekiq">Learn about Sidekiq here</a>.'
+    queue_size_warning: 'The number of queued jobs is %{queue_size}, which is high. This could indicate a problem with the Sidekiq process(es), or you may need to add more Sidekiq workers.'
     memory_warning: 'Your server is running with less than 1 GB of total memory. At least 1 GB of memory is recommended.'
     facebook_config_warning: 'The server is configured to allow signup and log in with Facebook (enable_facebook_logins), but the app id and app secret values are not set. Go to <a href="/admin/site_settings">the Site Settings</a> and update the settings. <a href="https://github.com/discourse/discourse/wiki/The-Discourse-Admin-Quick-Start-Guide#enable-facebook-logins" target="_blank">See this guide to learn more</a>.'
     twitter_config_warning: 'The server is configured to allow signup and log in with Twitter (enable_twitter_logins), but the key and secret values are not set. Go to <a href="/admin/site_settings">the Site Settings</a> and update the settings. <a href="https://github.com/discourse/discourse/wiki/The-Discourse-Admin-Quick-Start-Guide#enable-twitter-logins" target="_blank">See this guide to learn more</a>.'