Add table reindexing to the job scheduler

This schedules reindex on VmdbMetric, MiqQueue, MiqWorker on an hourly schedule

app/models/metric.rb

@@ -2,4 +2,8 @@ class Metric < ApplicationRecord
   BASE_COLS = ["id", "timestamp", "capture_interval_name", "resource_type", "resource_id", "resource_name", "tag_names", "parent_host_id", "parent_ems_cluster_id", "parent_ems_id", "parent_storage_id"]
 
   include Metric::Common
+
+  def self.reindex_table_name
+    "metrics_#{Time.now.utc.hour + 1}"
+  end
 end

app/models/miq_schedule_worker/jobs.rb

@@ -143,6 +143,12 @@ def metric_purge_all_timer
     end
   end
 
+  def database_maintenance_reindex_timer
+    ::Settings.database.maintenance.reindex_tables.each do |class_name|
+      queue_work(:class_name => class_name, :method_name => "reindex", :role => "database_operations", :zone => nil)
+    end
+  end
+
   def check_for_stuck_dispatch(threshold_seconds)
     class_n = "JobProxyDispatcher"
     method_n = "dispatch"

app/models/miq_schedule_worker/runner.rb

@@ -280,6 +280,13 @@ def schedules_for_database_operations_role
       :tags => [:database_operations, :database_metrics_purge_schedule],
     ) { enqueue(:metric_purge_all_timer) }
 
+    sched = ::Settings.database.maintenance.reindex_schedule
+    _log.info("database_maintenance_reindex_schedule: #{sched}")
+    scheduler.schedule_cron(
+      sched,
+      :tags => %i(database_operations database_maintenance_reindex_schedule),
+    ) { enqueue(:database_maintenance_reindex_timer) }
+
     @schedules[:database_operations]
   end
 

config/settings.yml

@@ -83,6 +83,12 @@
   :scanning_job_timeout: 20.minutes
   :concurrent_per_ems: 3
 :database:
+  :maintenance:
+    :reindex_schedule: "1 * * * *"
+    :reindex_tables:
+    - Metric
+    - MiqQueue
+    - MiqWorker
   :metrics_collection:
     :collection_schedule: "1 * * * *"
     :daily_rollup_schedule: "23 0 * * *"

lib/extensions/ar_base.rb

@@ -10,5 +10,15 @@ class Base
     def self.truncate
       connection.truncate(table_name, "#{name} Truncate")
     end
+
+    def self.reindex
+      _log.info("Reindexing table #{reindex_table_name}")
+      connection.reindex_table(reindex_table_name)
+      _log.info("Reindexing table #{reindex_table_name}")
+    end
+
+    def self.reindex_table_name
+      table_name
+    end
   end
 end

spec/models/miq_schedule_worker/runner_spec.rb

@@ -276,6 +276,7 @@
 
             @metrics_collection = {:collection_schedule => "1 * * * *", :daily_rollup_schedule => "23 0 * * *"}
             @metrics_history    = {:purge_schedule => "50 * * * *"}
+            @database_maintenance = {:reindex_schedule => "1 * * * *", :reindex_tables => %w(Metric MiqQueue MiqWorker)}
             database_config     = {:metrics_collection => @metrics_collection, :metrics_history => @metrics_history}
             stub_server_configuration(:database => database_config)
           end
@@ -287,7 +288,7 @@
 
             it "queues the right items" do
               scheduled_jobs = @schedule_worker.schedules_for_database_operations_role
-              expect(scheduled_jobs.size).to be(3)
+              expect(scheduled_jobs.size).to be(4)
 
               scheduled_jobs.each do |job|
                 expect(job).to be_a_kind_of(Rufus::Scheduler::CronJob)
@@ -313,6 +314,13 @@
                       message = MiqQueue.where(:class_name => class_name, :method_name => "purge_all_timer").first
                       expect(message).to have_attributes(:role => "database_operations", :zone => nil)
                     end
+                  when %w(database_operations database_maintenance_reindex_schedule)
+                    expect(job.original).to eq(@database_maintenance[:reindex_schedule])
+                    expect(MiqQueue.count).to eq(3)
+                    @database_maintenance[:reindex_tables].each do |class_name|
+                      message = MiqQueue.where(:class_name => class_name, :method_name => "reindex").first
+                      expect(message).to have_attributes(:role => "database_operations", :zone => nil)
+                    end
                   else
                     raise_unexpected_job_error(job)
                   end
@@ -328,7 +336,7 @@
 
             it "queues the right items" do
               scheduled_jobs = @schedule_worker.schedules_for_database_operations_role
-              expect(scheduled_jobs.size).to be(3)
+              expect(scheduled_jobs.size).to be(4)
 
               scheduled_jobs.each do |job|
                 expect(job).to be_kind_of(Rufus::Scheduler::CronJob)
@@ -355,6 +363,13 @@
                       message = MiqQueue.where(:class_name => class_name, :method_name => "purge_all_timer").first
                       expect(message).to have_attributes(:role => "database_operations", :zone => nil)
                     end
+                  when %w(database_operations database_maintenance_reindex_schedule)
+                    expect(job.original).to eq(@database_maintenance[:reindex_schedule])
+                    expect(MiqQueue.count).to eq(3)
+                    @database_maintenance[:reindex_tables].each do |class_name|
+                      message = MiqQueue.where(:class_name => class_name, :method_name => "reindex").first
+                      expect(message).to have_attributes(:role => "database_operations", :zone => nil)
+                    end
                   else
                     raise_unexpected_job_error(job)
                   end