Lite UI responsiveness overhaul + Query Store collector optimization (#510)#514
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erikdarlingdata merged 2 commits intodevfrom Mar 11, 2026
Merged
Lite UI responsiveness overhaul + Query Store collector optimization (#510)#514erikdarlingdata merged 2 commits intodevfrom
erikdarlingdata merged 2 commits intodevfrom
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Lite timer tick: 6-13s → ~900ms idle, ~3s under TPC-C load. UI refresh changes: - Timer tick and manual refresh now only query the visible tab/sub-tab - Sub-tab awareness for Queries (8→1-4 queries), Memory (5→1-3), and Blocking (7→1-3) tabs - Added _isRefreshing guard to tab switch handler to prevent DuckDB contention with timer ticks causing "not responding" freezes - Lightweight GetAlertCountsAsync replaces full row fetches for badge Query Store collector optimizations: - Stop collecting plan XML (CONVERT nvarchar(max) → NULL) — plans are fetched on-demand via FetchQueryStorePlanAsync, pre-cached XML was never used. DuckDB write: 6-16s → ~230ms - Added LOOP JOIN hint — SQL time: 374-1100ms → ~300ms (30x faster in isolated benchmarks) Dashboard visible-tab-only refresh carried forward from prior session. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Timer tick and Query Store collector before/after numbers from TPC-C load testing on SQL2022. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
_isRefreshingflag prevents tab switch handler from competing with timer ticksBenchmark results (TPC-C load on SQL2022)
Test plan
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