erikdarlingdata · erikdarlingdata · Feb 25, 2026 · Feb 25, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,6 +5,67 @@ 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).
 
+## [2.0.0] - 2026-02-25
+
+### Important
+
+- **Schema upgrade**: The `collect.memory_grant_stats` table gains new delta columns and drops unused warning columns. The `collect.session_wait_stats` table, its collector procedure, reporting view, and schedule entry are removed (zero UI coverage). Upgrade scripts run automatically via the CLI/GUI installer and use idempotent checks.
+
+### Added
+
+- **Graphical query plan viewer** — native ShowPlan rendering in both Dashboard and Lite with SSMS-parity operator icons, properties panel, tooltips, warning/parallelism badges, and tabbed plan display ([#220])
+- **Actual execution plan support** — execute queries with SET STATISTICS XML ON to capture actual plans, with loading indicator and confirmation dialog ([#233])
+- **PlanAnalyzer** — automated plan analysis with rules for missing indexes, eager spools, key lookups, implicit conversions, memory grants, and more
+- **Current Active Queries live snapshot** — real-time view of running queries with estimated/live plan download ([#149])
+- **Memory clerks tab** in Lite with picker-driven chart ([#145])
+- **Current Waits charts** in Blocking tab for both Dashboard and Lite ([#280])
+- **File I/O throughput charts** — read/write throughput trends, file-level latency breakdown, queued I/O overlay ([#281])
+- **Memory grant stats charts** — standardized collection with delta framework integration and trend visualization ([#281])
+- **CPU scheduler pressure status** — real-time scheduler, worker, runnable task counts with color-coded pressure level below CPU chart
+- **Collection log drill-down** and daily summary in Lite ([#138])
+- **Collector duration trends chart** in Dashboard Collection Health ([#138])
+- **Themed perfmon counter packs** — 14 new counters with organized themed groups ([#255])
+- **User-configurable connection timeout** setting ([#236])
+- **Per-collector retention** — uses per-collector retention from `config.collection_schedule` in data retention ([#237])
+- **Query identifiers** in drill-down windows — query hash, plan hash, SQL handle visible for identification ([#268])
+- **Trace pattern drill-down** with missing columns and query text tooltips ([#273])
+- **Query Store Regressions drill-down** with TVF rewrite for performance ([#274])
+- **CLI `--help` flag** for installer ([#111])
+- Sort arrows, right-aligned numerics, and initial sort indicators across all grids ([#110])
+- Copyable plan viewer properties ([#269])
+- Standardized chart save/export filenames between Dashboard and Lite ([#284])
+- Full Dashboard column parity for query_stats, procedure_stats, and query_store_stats
+- Min/max extremes surfaced in both apps — physical reads, rows, grant KB, spills, CLR time, log bytes ([#281])
+
+### Changed
+
+- Query Store detection uses `sys.database_query_store_options` instead of `sys.databases.is_query_store_on` for Azure SQL DB compatibility ([#287])
+- Config tab consolidation, DB drop on server remove, DuckDB-first plan lookups, procedure stats parity
+- Collector health status now detects consecutive recent failures — 5+ consecutive errors = FAILING, 3+ = WARNING
+- Plan buttons now show a MessageBox when no plan is available instead of silently doing nothing
+- CSV export uses locale-appropriate separators for non-US locales ([#240])
+- Query Store Regressions and Query Trace Patterns migrated to popup grid filtering ([#260])
+- NuGet packages updated; xUnit v3 migration
+
+### Fixed
+
+- **DuckDB file corruption** during maintenance — ReaderWriterLockSlim coordination, archive-all-and-reset at 512MB replaces compaction ([#218])
+- Archive view column mismatch, wait_stats thread-safety, and percent_complete type cast ([#234])
+- Collector health status bar text color ([#234])
+- View Plan for Query Store and Query Store Regressions tabs ([#261])
+- Query Store drill-down time filter alignment with main view ([#263])
+- Execution count mismatches between main views and drill-downs
+- Drill-down chart UX — sparse data markers, hover tooltips, window sizing ([#271])
+- Truncated status text in Add Server dialog ([#257])
+- Scrollbar visibility, self-filtering artifacts, missing columns, and context menus ([#245], [#246], [#247], [#248])
+- query_stats and procedure_stats collectors ignoring recent queries
+- Blank tooltips on warning and parallel badge icons
+- Missing chart context menu on File I/O Throughput charts in Lite
+
+### Removed
+
+- `collect.session_wait_stats` table, `collect.session_wait_stats_collector` procedure, `report.session_wait_analysis` view, and schedule entry — zero UI coverage, never surfaced in Dashboard or Lite ([#281])
+
 ## [1.3.0] - 2026-02-20
 
 ### Important
@@ -119,6 +180,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Delta normalization for per-second rate calculations
 - Dark theme UI
 
+[2.0.0]: https://github.com/erikdarlingdata/PerformanceMonitor/compare/v1.3.0...v2.0.0
 [1.3.0]: https://github.com/erikdarlingdata/PerformanceMonitor/compare/v1.2.0...v1.3.0
 [1.2.0]: https://github.com/erikdarlingdata/PerformanceMonitor/compare/v1.1.0...v1.2.0
 [1.1.0]: https://github.com/erikdarlingdata/PerformanceMonitor/compare/v1.0.0...v1.1.0
@@ -187,3 +249,28 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#206]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/206
 [#210]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/210
 [#214]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/214
+[#218]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/218
+[#220]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/220
+[#233]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/233
+[#234]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/234
+[#236]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/236
+[#237]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/237
+[#240]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/240
+[#245]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/245
+[#246]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/246
+[#247]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/247
+[#248]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/248
+[#255]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/255
+[#257]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/257
+[#260]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/260
+[#261]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/261
+[#263]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/263
+[#268]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/268
+[#269]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/269
+[#271]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/271
+[#273]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/273
+[#274]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/274
+[#280]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/280
+[#281]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/281
+[#284]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/284
+[#287]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/287
diff --git a/Dashboard/Controls/QueryPerformanceContent.xaml.cs b/Dashboard/Controls/QueryPerformanceContent.xaml.cs
@@ -699,45 +699,60 @@ private void ApplyCurrentActiveFilters()
 
         private void DownloadCurrentActiveEstPlan_Click(object sender, RoutedEventArgs e)
         {
-            if (sender is Button button && button.DataContext is LiveQueryItem item && !string.IsNullOrEmpty(item.QueryPlan))
+            if (sender is not Button button || button.DataContext is not LiveQueryItem item) return;
+
+            if (string.IsNullOrEmpty(item.QueryPlan))
             {
-                var timestamp = DateTime.Now.ToString("yyyyMMdd_HHmmss", CultureInfo.InvariantCulture);
-                var defaultFileName = $"estimated_plan_{item.SessionId}_{timestamp}.sqlplan";
+                MessageBox.Show("No estimated plan is available for this query.", "No Plan Available",
+                    MessageBoxButton.OK, MessageBoxImage.Information);
+                return;
+            }
 
-                var saveFileDialog = new SaveFileDialog
-                {
-                    FileName = defaultFileName,
-                    DefaultExt = ".sqlplan",
-                    Filter = "SQL Plan (*.sqlplan)|*.sqlplan|XML Files (*.xml)|*.xml|All Files (*.*)|*.*",
-                    Title = "Save Query Plan"
-                };
+            var timestamp = DateTime.Now.ToString("yyyyMMdd_HHmmss", CultureInfo.InvariantCulture);
+            var defaultFileName = $"estimated_plan_{item.SessionId}_{timestamp}.sqlplan";
 
-                if (saveFileDialog.ShowDialog() == true)
-                {
-                    File.WriteAllText(saveFileDialog.FileName, item.QueryPlan);
-                }
+            var saveFileDialog = new SaveFileDialog
+            {
+                FileName = defaultFileName,
+                DefaultExt = ".sqlplan",
+                Filter = "SQL Plan (*.sqlplan)|*.sqlplan|XML Files (*.xml)|*.xml|All Files (*.*)|*.*",
+                Title = "Save Query Plan"
+            };
+
+            if (saveFileDialog.ShowDialog() == true)
+            {
+                File.WriteAllText(saveFileDialog.FileName, item.QueryPlan);
             }
         }
 
         private void DownloadCurrentActiveLivePlan_Click(object sender, RoutedEventArgs e)
         {
-            if (sender is Button button && button.DataContext is LiveQueryItem item && !string.IsNullOrEmpty(item.LiveQueryPlan))
+            if (sender is not Button button || button.DataContext is not LiveQueryItem item) return;
+
+            if (string.IsNullOrEmpty(item.LiveQueryPlan))
             {
-                var timestamp = DateTime.Now.ToString("yyyyMMdd_HHmmss", CultureInfo.InvariantCulture);
-                var defaultFileName = $"live_plan_{item.SessionId}_{timestamp}.sqlplan";
+                MessageBox.Show(
+                    "No live query plan is available for this session. The query may have completed before the plan could be captured.",
+                    "No Plan Available",
+                    MessageBoxButton.OK,
+                    MessageBoxImage.Information);
+                return;
+            }
 
-                var saveFileDialog = new SaveFileDialog
-                {
-                    FileName = defaultFileName,
-                    DefaultExt = ".sqlplan",
-                    Filter = "SQL Plan (*.sqlplan)|*.sqlplan|XML Files (*.xml)|*.xml|All Files (*.*)|*.*",
-                    Title = "Save Live Query Plan"
-                };
+            var timestamp = DateTime.Now.ToString("yyyyMMdd_HHmmss", CultureInfo.InvariantCulture);
+            var defaultFileName = $"live_plan_{item.SessionId}_{timestamp}.sqlplan";
 
-                if (saveFileDialog.ShowDialog() == true)
-                {
-                    File.WriteAllText(saveFileDialog.FileName, item.LiveQueryPlan);
-                }
+            var saveFileDialog = new SaveFileDialog
+            {
+                FileName = defaultFileName,
+                DefaultExt = ".sqlplan",
+                Filter = "SQL Plan (*.sqlplan)|*.sqlplan|XML Files (*.xml)|*.xml|All Files (*.*)|*.*",
+                Title = "Save Live Query Plan"
+            };
+
+            if (saveFileDialog.ShowDialog() == true)
+            {
+                File.WriteAllText(saveFileDialog.FileName, item.LiveQueryPlan);
             }
         }
 
@@ -798,7 +813,17 @@ private async void ViewEstimatedPlan_Click(object sender, RoutedEventArgs e)
             }
 
             if (planXml != null)
+            {
                 ViewPlanRequested?.Invoke(planXml, label, queryText);
+            }
+            else
+            {
+                MessageBox.Show(
+                    "No query plan is available for this row. The plan may have been evicted from the plan cache since it was last collected.",
+                    "No Plan Available",
+                    MessageBoxButton.OK,
+                    MessageBoxImage.Information);
+            }
         }
 
         private async void GetActualPlan_Click(object sender, RoutedEventArgs e)

diff --git a/Dashboard/Controls/ResourceMetricsContent.xaml b/Dashboard/Controls/ResourceMetricsContent.xaml
@@ -44,9 +44,14 @@
                         <Grid.RowDefinitions>
                             <RowDefinition Height="Auto"/>
                             <RowDefinition Height="*"/>
+                            <RowDefinition Height="Auto"/>
                         </Grid.RowDefinitions>
                         <TextBlock Text="CPU Utilization (%)" FontWeight="Bold" FontSize="14" Margin="10,5" Foreground="{DynamicResource ForegroundBrush}"/>
                         <ScottPlot:WpfPlot Grid.Row="1" x:Name="ServerUtilTrendsCpuChart" Margin="5"/>
+                        <TextBlock Grid.Row="2" x:Name="CpuSchedulerStatusText"
+                                   Margin="10,0,10,5" FontSize="11"
+                                   HorizontalAlignment="Center"
+                                   Foreground="{DynamicResource ForegroundBrush}"/>
                     </Grid>
                 </Border>
 

diff --git a/Dashboard/Controls/ResourceMetricsContent.xaml.cs b/Dashboard/Controls/ResourceMetricsContent.xaml.cs
@@ -16,6 +16,7 @@
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Documents;
 using System.Windows.Media;
 using Microsoft.Win32;
 using PerformanceMonitorDashboard.Models;
@@ -982,13 +983,58 @@ private async Task RefreshServerTrendsAsync()
                 LoadServerTrendsTempdbChart(await tempdbTask, _serverTrendsHoursBack, _serverTrendsFromDate, _serverTrendsToDate);
                 LoadServerTrendsMemoryChart(await memoryTask, _serverTrendsHoursBack, _serverTrendsFromDate, _serverTrendsToDate);
                 LoadServerTrendsPerfmonChart(await perfmonTask, _serverTrendsHoursBack, _serverTrendsFromDate, _serverTrendsToDate);
+
+                try
+                {
+                    var pressure = await _databaseService.GetCpuPressureAsync();
+                    UpdateCpuSchedulerStatus(pressure);
+                }
+                catch (Exception pressureEx)
+                {
+                    Logger.Error($"Error loading CPU scheduler pressure: {pressureEx.Message}", pressureEx);
+                }
             }
             catch (Exception ex)
             {
                 Logger.Error($"Error loading server trends: {ex.Message}", ex);
             }
         }
 
+        private void UpdateCpuSchedulerStatus(CpuPressureItem? pressure)
+        {
+            if (pressure == null)
+            {
+                CpuSchedulerStatusText.Text = "";
+                return;
+            }
+
+            CpuSchedulerStatusText.Inlines.Clear();
+
+            var summary = $"Schedulers: {pressure.TotalSchedulers} | " +
+                          $"Workers: {pressure.TotalWorkers:N0}/{pressure.MaxWorkers:N0} ({pressure.WorkerUtilizationPercent:F1}%) | " +
+                          $"Runnable: {pressure.TotalRunnableTasks} ({pressure.AvgRunnableTasksPerScheduler:F2}/sched) | " +
+                          $"Active: {pressure.TotalActiveRequests} | " +
+                          $"Queued: {pressure.TotalQueuedRequests} | ";
+
+            CpuSchedulerStatusText.Inlines.Add(new Run(summary));
+
+            var levelText = pressure.PressureLevel;
+            var levelRun = new Run(levelText);
+
+            if (levelText.Contains("CRITICAL") || levelText.Contains("HIGH"))
+            {
+                levelRun.Foreground = new SolidColorBrush(Color.FromRgb(0xFF, 0x44, 0x44));
+                levelRun.FontWeight = FontWeights.Bold;
+            }
+            else if (levelText.Contains("MEDIUM"))
+            {
+                levelRun.Foreground = new SolidColorBrush(Color.FromRgb(0xFF, 0xA5, 0x00));
+                levelRun.FontWeight = FontWeights.Bold;
+            }
+
+            CpuSchedulerStatusText.Inlines.Add(levelRun);
+        }
+
         private void LoadServerTrendsCpuChart(IEnumerable<CpuSpikeItem> cpuData, int hoursBack, DateTime? fromDate, DateTime? toDate)
         {
             DateTime rangeEnd = toDate ?? Helpers.ServerTimeHelper.ServerNow;

diff --git a/Dashboard/Dashboard.csproj b/Dashboard/Dashboard.csproj
@@ -6,7 +6,7 @@
     <UseWPF>true</UseWPF>
     <AssemblyName>PerformanceMonitorDashboard</AssemblyName>
     <Product>SQL Server Performance Monitor Dashboard</Product>
-    <Version>1.3.0</Version>
+    <Version>2.0.0</Version>
     <Company>Darling Data, LLC</Company>
     <Copyright>Copyright © 2026 Darling Data, LLC</Copyright>
     <ApplicationIcon>EDD.ico</ApplicationIcon>

diff --git a/Dashboard/MainWindow.xaml.cs b/Dashboard/MainWindow.xaml.cs
@@ -445,6 +445,17 @@ private void OpenServerTab(ServerConnection server)
 
             /* Set server UTC offset for chart axis bounds */
             var connStatus = _serverManager.GetConnectionStatus(server.Id);
+            if (!connStatus.UtcOffsetMinutes.HasValue)
+            {
+                /* Background check hasn't run yet — fetch offset synchronously so
+                   the first tab open doesn't default to local timezone. */
+                try
+                {
+                    _serverManager.CheckConnectionAsync(server.Id).GetAwaiter().GetResult();
+                    connStatus = _serverManager.GetConnectionStatus(server.Id);
+                }
+                catch { /* Fall through to local offset default */ }
+            }
             var utcOffset = connStatus.UtcOffsetMinutes ?? (int)TimeZoneInfo.Local.GetUtcOffset(DateTime.UtcNow).TotalMinutes;
             Helpers.ServerTimeHelper.UtcOffsetMinutes = utcOffset;
 

diff --git a/Installer/PerformanceMonitorInstaller.csproj b/Installer/PerformanceMonitorInstaller.csproj
@@ -20,10 +20,10 @@
     <!-- Application metadata -->
     <AssemblyName>PerformanceMonitorInstaller</AssemblyName>
     <Product>SQL Server Performance Monitor Installer</Product>
-    <Version>1.3.0</Version>
-    <AssemblyVersion>1.3.0.0</AssemblyVersion>
-    <FileVersion>1.3.0.0</FileVersion>
-    <InformationalVersion>1.3.0</InformationalVersion>
+    <Version>2.0.0</Version>
+    <AssemblyVersion>2.0.0.0</AssemblyVersion>
+    <FileVersion>2.0.0.0</FileVersion>
+    <InformationalVersion>2.0.0</InformationalVersion>
     <Company>Darling Data, LLC</Company>
     <Copyright>Copyright © 2026 Darling Data, LLC</Copyright>
     <Description>Installation utility for SQL Server Performance Monitor - Supports SQL Server 2016-2025</Description>

diff --git a/InstallerGui/InstallerGui.csproj b/InstallerGui/InstallerGui.csproj
@@ -8,7 +8,7 @@
     <AssemblyName>PerformanceMonitorInstallerGui</AssemblyName>
     <RootNamespace>PerformanceMonitorInstallerGui</RootNamespace>
     <Product>SQL Server Performance Monitor Installer</Product>
-    <Version>1.3.0</Version>
+    <Version>2.0.0</Version>
     <Company>Darling Data, LLC</Company>
     <Copyright>Copyright © 2026 Darling Data, LLC</Copyright>
     <ApplicationIcon>EDD.ico</ApplicationIcon>