Fixes #27075 - fact names check

definitions/checks/foreman/facts_names.rb

@@ -0,0 +1,32 @@
+module Checks
+  module Foreman
+    class FactsNames < ForemanMaintain::Check
+      metadata do
+        label :foreman_fact_names
+        tags :default
+        confine do
+          feature(:foreman_database)
+        end
+        description 'Check number of fact names in database'
+      end
+
+      def run
+        max = 10_000
+        sql = <<-SQL
+        select fact_values.host_id, count(fact_values.id) from fact_values
+        group by fact_values.host_id order by count desc limit 1
+        SQL
+        result = feature(:foreman_database).query(sql).first
+        if result
+          host_id = result['host_id']
+          count = result['count'].to_i
+          assert(count < max,
+                 "Host (ID #{host_id}) has #{count} fact values which is more than #{max}.\n" \
+                 'This can cause slow fact processing.',
+                 :warn => true,
+                 :next_steps => [Procedures::KnowledgeBaseArticle.new(:doc => 'many_fact_values')])
+        end
+      end
+    end
+  end
+end

definitions/procedures/knowledge_base_article.rb

@@ -25,7 +25,8 @@ def kcs_documents
     {
       'fix_cpdb_validate_failure' => 'https://access.redhat.com/solutions/3362821',
       'fix_db_migrate_failure_on_duplicate_roles' => 'https://access.redhat.com/solutions/3998941',
-      'upgrade_puppet_guide_for_sat63' => 'https://access.redhat.com/documentation/en-us/red_hat_satellite/6.3/html/upgrading_and_updating_red_hat_satellite/upgrading_puppet-1'
+      'upgrade_puppet_guide_for_sat63' => 'https://access.redhat.com/documentation/en-us/red_hat_satellite/6.3/html/upgrading_and_updating_red_hat_satellite/upgrading_puppet-1',
+      'many_fact_values' => 'https://access.redhat.com/solutions/4163891'
     }
   end
 end