Ignore UPDATE STATISTICS for already up-to-date stats

Author: sergiisyrovatchenko

Forms/MainBox.cs

@@ -216,26 +216,41 @@ private void ScanIndexesFinish(object sender, RunWorkerCompletedEventArgs e) {
 
       buttonStopScan.Visibility = BarItemVisibility.Never;
 
-      List<Index> indexes = _indexes.Where(_ => _.Fragmentation >= (Settings.Options.SkipOperation == IndexOp.IGNORE ? Settings.Options.FirstThreshold : 0) 
-                                             && _.PagesCount >= Settings.Options.MinIndexSize.PageSize()
-                                             && _.PagesCount <= Settings.Options.MaxIndexSize.PageSize())
-                                        .OrderBy(_ => _.Fragmentation < Settings.Options.FirstThreshold
-                                                            && Settings.Options.SkipOperation != Settings.Options.FirstOperation
-                                                      ? 3
-                                                      :  _.Fragmentation < Settings.Options.SecondThreshold 
-                                                        && Settings.Options.FirstOperation != Settings.Options.SecondOperation 
-                                                            ? 2 : 1 )
-                                        .ThenByDescending(_ => (_.Fragmentation + 0.1) * _.PagesCount).ToList();
+      var o = Settings.Options;
+
+      List<Index> indexes = _indexes.Where(_ => _.Fragmentation >= (o.SkipOperation == IndexOp.IGNORE ? o.FirstThreshold : 0)
+                                         && _.PagesCount >= o.MinIndexSize.PageSize()
+                                         && _.PagesCount <= o.MaxIndexSize.PageSize())
+                                    .OrderBy(_ => _.Fragmentation < o.FirstThreshold && o.SkipOperation != o.FirstOperation
+                                                  ? 3
+                                                  :  _.Fragmentation < o.SecondThreshold && o.FirstOperation != o.SecondOperation
+                                                        ? 2 : 1 )
+                                    .ThenByDescending(_ => (_.Fragmentation + 0.1) * _.PagesCount).ToList();
 
       QueryEngine.UpdateFixType(indexes);
       QueryEngine.FindDublicateIndexes(indexes);
       QueryEngine.FindUnusedIndexes(indexes);
 
+      if (o.StatsIgnoreHoursEnabled || o.StatsIgnoreSampledPercentEnabled) {
+        indexes.RemoveAll(_ => _.IndexStats != null
+           && (
+                 _.FixType == IndexOp.UPDATE_STATISTICS_FULL
+              || _.FixType == IndexOp.UPDATE_STATISTICS_RESAMPLE
+              || _.FixType == IndexOp.UPDATE_STATISTICS_SAMPLE
+            )
+          && (
+                (o.StatsIgnoreHoursEnabled && (DateTime.UtcNow - (DateTime)_.IndexStats).TotalHours < o.StatsIgnoreHours)
+              ||
+                (o.StatsIgnoreSampledPercentEnabled && _.StatsSampled > o.StatsIgnoreSampledPercent)
+            )
+          );
+      }
+
       _ps.Indexes = _ps.IndexesTotal = indexes.Count;
       _ps.IndexesSize = indexes.Sum(_ => _.PagesCount);
       _ps.SavedSpace = indexes.Sum(_ => _.UnusedPagesCount);
       UpdateProgressStats();
-      
+
       Output.Current.Add($"Processed: {_indexes.Count}. Fragmented: {_ps.Indexes}{(_ps.Indexes == 0 ? ". No indexes found. Try searching again or change settings..." : string.Empty)}");
 
       grid.DataSource = indexes;

Forms/SettingsBox.Designer.cs

@@ -56,14 +56,19 @@ private void UpdateControls(Options o) {
       boxConnectionTimeout.Value = o.ConnectionTimeout;
       boxCommandTimeout.Value = o.CommandTimeout;
       boxWaitAtLowPriority.Checked = o.WaitAtLowPriority;
-      boxMaxDuration.EditValue = o.MaxDuration;
+      boxMaxDuration.Value = o.MaxDuration;
       boxAbortAfterWait.EditValue = o.AbortAfterWait;
       boxDataCompression.EditValue = o.DataCompression;
       boxNoRecompute.EditValue = o.NoRecompute;
-      boxFillFactor.EditValue = o.FillFactor;
+      boxFillFactor.Value = o.FillFactor;
       boxScanMode.EditValue = o.ScanMode;
       boxShowSettingsWhenConnectionChanged.Checked = o.ShowSettingsWhenConnectionChanged;
 
+      boxStatsIgnoreHours.Value = o.StatsIgnoreHours;
+      boxStatsIgnoreHoursEnabled.Checked = o.StatsIgnoreHoursEnabled;
+      boxStatsIgnoreSampledPercent.Value = o.StatsIgnoreSampledPercent;
+      boxStatsIgnoreSampledPercentEnabled.Checked = o.StatsIgnoreSampledPercentEnabled;
+
       boxScanHeap.Checked = o.ScanHeap;
       boxScanClusteredIndex.Checked = o.ScanClusteredIndex;
       boxScanNonClusteredIndex.Checked = o.ScanNonClusteredIndex;
@@ -108,6 +113,11 @@ public Options GetSettings() {
         ScanMode = boxScanMode.EditValue.ToEnum<ScanMode>(),
         ShowSettingsWhenConnectionChanged = boxShowSettingsWhenConnectionChanged.Checked,
 
+        StatsIgnoreHours = (int)boxStatsIgnoreHours.Value,
+        StatsIgnoreHoursEnabled = boxStatsIgnoreHoursEnabled.Checked,
+        StatsIgnoreSampledPercent = (int)boxStatsIgnoreSampledPercent.Value,
+        StatsIgnoreSampledPercentEnabled = boxStatsIgnoreSampledPercentEnabled.Checked,
+
         ScanHeap = boxScanHeap.Checked,
         ScanClusteredIndex = boxScanClusteredIndex.Checked,
         ScanNonClusteredIndex = boxScanNonClusteredIndex.Checked,

Forms/SettingsBox.cs

@@ -192,4 +192,13 @@
   <metadata name="pictureBox4.GenerateMember" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
     <value>False</value>
   </metadata>
+  <metadata name="groupControl6.GenerateMember" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>False</value>
+  </metadata>
+  <metadata name="labelControl4.GenerateMember" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>False</value>
+  </metadata>
+  <metadata name="labelControl10.GenerateMember" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>False</value>
+  </metadata>
 </root>