Added additional indexes to speed up DecisionMaker performance.

src/NzbDrone.Core/Datastore/Migration/120_update_series_episodes_history_indexes.cs

@@ -0,0 +1,24 @@
+using FluentMigrator;
+using NzbDrone.Core.Datastore.Migration.Framework;
+
+namespace NzbDrone.Core.Datastore.Migration
+{
+    [Migration(120)]
+    public class update_series_episodes_history_indexes : NzbDroneMigrationBase
+    {
+        protected override void MainDbUpgrade()
+        {
+            Create.Index().OnTable("Series").OnColumn("TvdbId").Ascending();
+            Create.Index().OnTable("Episodes").OnColumn("SeriesId").Ascending()
+                                              .OnColumn("AirDate").Ascending();
+
+            Delete.Index().OnTable("History").OnColumn("EpisodeId");
+            Create.Index().OnTable("History").OnColumn("EpisodeId").Ascending()
+                                             .OnColumn("Date").Descending();
+
+            Delete.Index().OnTable("History").OnColumn("DownloadId");
+            Create.Index().OnTable("History").OnColumn("DownloadId").Ascending()
+                                             .OnColumn("Date").Descending();
+        }
+    }
+}

src/NzbDrone.Core/NzbDrone.Core.csproj

@@ -224,6 +224,7 @@
     <Compile Include="Datastore\Migration\042_add_download_clients_table.cs" />
     <Compile Include="Datastore\Migration\043_convert_config_to_download_clients.cs" />
     <Compile Include="Datastore\Migration\044_fix_xbmc_episode_metadata.cs" />
+    <Compile Include="Datastore\Migration\120_update_series_episodes_history_indexes.cs" />
     <Compile Include="Datastore\Migration\118_add_history_eventType_index.cs" />
     <Compile Include="Datastore\Migration\045_add_indexes.cs" />
     <Compile Include="Datastore\Migration\046_fix_nzb_su_url.cs" />