erikdarlingdata · erikdarlingdata · Apr 22, 2026 · Apr 15, 2026 · Apr 15, 2026 · Apr 15, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,6 +5,49 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.8.0] - TBD
+
+### Important
+
+- **New nonclustered indexes** on `collect.query_stats`, `collect.procedure_stats`, and `collect.query_store_data` to eliminate Eager Index Spools in Dashboard grid queries. On large installations these indexes may take several minutes to build; the upgrade script uses `ONLINE = ON` on Enterprise/Developer/Azure editions and falls back to offline on Standard/Web ([#835])
+
+### Added
+
+- **Memory Pressure Events in Lite** — the collector, chart, and `get_memory_pressure_events` MCP tool previously only in the Full Edition are now available in Lite ([#865])
+- **Grid auto-scrolling** in Lite and Dashboard ([#843]) — thanks [@ClaudioESSilva](https://github.com/ClaudioESSilva)
+
+### Changed
+
+- **PlanAnalyzer and BenefitScorer** synced with PerformanceStudio's Apr 9–16 improvements
+- **Query/Procedure/Query Store stats** refactored to a phased DECOMPRESS approach; removed unhelpful `WAITFOR DECOMPRESS` filters
+- **Query/Procedure/Query Store grids** capped to TOP 500 to prevent UI freezes on large datasets
+- **Server tabs lazy-load** — only the visible server tab loads on startup; remaining tabs load on first visit
+- **Webhook URLs (Dashboard)** encrypted with DPAPI via Windows Credential Manager — Lite webhook URLs remain in plaintext settings for now
+- **DuckDB queries hardened** — parameterized values, escaped paths, fixed `IsArchiving` race
+- **Lite chart axes and sub-tab styling** polished, then ported to Dashboard
+
+### Fixed
+
+- **Memory Pressure Events chart filter** was dropping valid rows; added MCP interpretation guidance ([#865])
+- **FinOps recommendation severity sort order** in Lite and Dashboard ([#872])
+- **Overview crosshair** disappearing after tab switches or layout passes
+- **Blocked process report plan lookup** returning the wrong plan ([#867])
+- **FinOps TDE recommendation** flagging Standard edition on SQL Server 2019+ where TDE is free ([#854])
+- **Azure SQL DB collector** falls back to single-database mode when `master` is inaccessible ([#857])
+- **Azure SQL DB query snapshots** scoped to the current database ([#857])
+- **Azure SQL DB query snapshot prefilter** — request set is narrowed into `#temp` before joining DMVs to avoid Azure-specific execution plan issues ([#857])
+- **Azure SQL DB live query plans** — now skipped gracefully instead of erroring ([#857])
+- **Azure SQL DB memory_stats collector** — dropped `sys.dm_os_schedulers` which is blocked on elastic-pool contained users regardless of DB-scoped grants ([#857])
+- **Non-transient permission denials** now stop collector retries instead of looping forever ([#857])
+
+[#835]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/835
+[#843]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/843
+[#854]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/854
+[#857]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/857
+[#865]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/865
+[#867]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/867
+[#872]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/872
+
 ## [2.7.0] - 2026-04-13
 
 ### Added

diff --git a/Dashboard/Analysis/SqlServerBaselineProvider.cs b/Dashboard/Analysis/SqlServerBaselineProvider.cs
@@ -463,7 +463,7 @@ private static double PoolVariance(List<BaselineBucket> buckets, double grandMea
         return totalSumSq / (totalSamples - 1);
     }
 
-    private class CachedBaseline
+    private sealed class CachedBaseline
     {
         public DateTime ComputedAt { get; init; }
         public DateTime RealTime { get; init; }

diff --git a/Dashboard/Controls/ConfigChangesContent.xaml b/Dashboard/Controls/ConfigChangesContent.xaml
@@ -15,7 +15,7 @@
             <MenuItem Header="Export to CSV..." Click="ExportToCsv_Click"/>
         </ContextMenu>
     </UserControl.Resources>
-    <TabControl>
+    <TabControl ItemContainerStyle="{DynamicResource SubTabItemStyle}">
         <!-- Server Configuration Changes Sub-Tab -->
         <TabItem Header="Server Config Changes">
             <Grid>

diff --git a/Dashboard/Controls/CorrelatedTimelineLanesControl.xaml.cs b/Dashboard/Controls/CorrelatedTimelineLanesControl.xaml.cs
@@ -31,7 +31,12 @@ public partial class CorrelatedTimelineLanesControl : UserControl
     public CorrelatedTimelineLanesControl()
     {
         InitializeComponent();
-        Unloaded += (_, _) => _crosshairManager?.Dispose();
+        /* No Unloaded → Dispose() handler: WPF fires Unloaded for transient
+           reasons (tab virtualization, layout rebuilds) and Dispose() clears
+           the crosshair manager's lane list, permanently breaking the crosshair
+           until the ServerTab is rebuilt. The manager holds only managed state
+           (a Popup + lane references) — letting GC clean it up with the control
+           is fine. */
     }
 
     /// <summary>
@@ -69,6 +74,9 @@ public async Task RefreshAsync(int hoursBack, DateTime? fromDate, DateTime? toDa
 
         _crosshairManager?.PrepareForRefresh();
 
+        try
+        {
+
         var cpuTask = _dataService.GetCpuUtilizationAsync(hoursBack, fromDate, toDate);
         var waitTask = _dataService.GetTotalWaitStatsTrendAsync(hoursBack, fromDate, toDate);
         var blockingTask = _dataService.GetBlockedSessionTrendAsync(hoursBack, fromDate, toDate);
@@ -225,8 +233,18 @@ public async Task RefreshAsync(int hoursBack, DateTime? fromDate, DateTime? toDa
             _crosshairManager?.SetComparisonLabel(ComparisonLabel(comparisonRange.Value, fromDate, hoursBack));
         }
 
+        /* VLines must be re-attached before SyncXAxes so they're part of
+           the render set when the chart refreshes. */
         _crosshairManager?.ReattachVLines();
         SyncXAxes(hoursBack, fromDate, toDate);
+        }
+        finally
+        {
+            /* Safety net: if something threw between PrepareForRefresh() and the
+               ReattachVLines() call above, VLines are still null. EnsureVLinesAttached
+               creates them only for lanes where VLine is null, so it's idempotent. */
+            _crosshairManager?.EnsureVLinesAttached();
+        }
     }
 
     /// <summary>
@@ -320,7 +338,7 @@ private void UpdateBlockingLane(List<(double Time, double Value)> blockingData,
             }
         }
 
-        BlockingChart.Plot.Axes.DateTimeTicksBottom();
+        BlockingChart.Plot.Axes.DateTimeTicksBottomDateChange();
         BlockingChart.Plot.Axes.Bottom.TickLabelStyle.IsVisible = false;
         TabHelpers.ReapplyAxisColors(BlockingChart);
 
@@ -394,7 +412,7 @@ private void UpdateLane(ScottPlot.WPF.WpfPlot chart, string title,
 
         _crosshairManager?.SetLaneData(chart, times, values);
 
-        chart.Plot.Axes.DateTimeTicksBottom();
+        chart.Plot.Axes.DateTimeTicksBottomDateChange();
         if (chart != FileIoChart)
             chart.Plot.Axes.Bottom.TickLabelStyle.IsVisible = false;
 

diff --git a/Dashboard/Controls/CurrentConfigContent.xaml b/Dashboard/Controls/CurrentConfigContent.xaml
@@ -15,7 +15,7 @@
             <MenuItem Header="Export to CSV..." Click="ExportToCsv_Click"/>
         </ContextMenu>
     </UserControl.Resources>
-    <TabControl>
+    <TabControl ItemContainerStyle="{DynamicResource SubTabItemStyle}">
         <!-- Current Server Configuration Sub-Tab -->
         <TabItem Header="Server Configuration">
             <Grid>

diff --git a/Dashboard/Controls/FinOpsContent.xaml b/Dashboard/Controls/FinOpsContent.xaml
@@ -44,7 +44,7 @@
                       SelectionChanged="ServerSelector_SelectionChanged"/>
         </StackPanel>
 
-        <TabControl Grid.Row="1" Background="Transparent" BorderThickness="0">
+        <TabControl Grid.Row="1" Background="Transparent" BorderThickness="0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
 
         <!-- Recommendations Sub-Tab -->
         <TabItem Header="Recommendations">
@@ -90,7 +90,7 @@
                                 </StackPanel>
                             </DataGridTextColumn.Header>
                         </DataGridTextColumn>
-                        <DataGridTextColumn Binding="{Binding Severity}" MinWidth="80" Width="Auto">
+                        <DataGridTextColumn Binding="{Binding Severity}" SortMemberPath="SeveritySort" MinWidth="80" Width="Auto">
                             <DataGridTextColumn.Header>
                                 <StackPanel Orientation="Horizontal">
                                     <Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="Severity" Click="FinOpsFilter_Click" Margin="0,0,4,0"/>

diff --git a/Dashboard/Controls/MemoryContent.xaml b/Dashboard/Controls/MemoryContent.xaml
@@ -32,7 +32,7 @@
         </ResourceDictionary>
     </UserControl.Resources>
 
-    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0">
+    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
         <!-- Memory Overview Sub-Tab -->
         <TabItem Header="Memory Overview">
             <!-- Chart + Summary Panel (grid removed) -->