From 2a4eb014294bf70ff06479a443fc2c2aa077b68b Mon Sep 17 00:00:00 2001
From: Erik Darling <2136037+erikdarlingdata@users.noreply.github.com>
Date: Fri, 20 Feb 2026 08:37:07 -0500
Subject: [PATCH] Exclude WAITFOR sessions from long-running query alerts

CDC capture agents use `waitfor delay @waittime` and run indefinitely by design.
Service Broker listeners use `waitfor receive`. Neither should trigger long-running
query alerts.

Adds NOT LIKE filters for both patterns in Dashboard (live DMV query) and Lite
(DuckDB alert query).

Fixes #151.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 Dashboard/Services/DatabaseService.NocHealth.cs | 2 ++
 Lite/Services/LocalDataService.WaitStats.cs     | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/Dashboard/Services/DatabaseService.NocHealth.cs b/Dashboard/Services/DatabaseService.NocHealth.cs
index e5125e3d..c1f59887 100644
--- a/Dashboard/Services/DatabaseService.NocHealth.cs
+++ b/Dashboard/Services/DatabaseService.NocHealth.cs
@@ -623,6 +623,8 @@ CROSS APPLY sys.dm_exec_sql_text(r.sql_handle) AS t
                 JOIN sys.dm_exec_sessions AS s ON s.session_id = r.session_id
                 WHERE r.session_id > 50
                 AND r.total_elapsed_time >= @thresholdMs
+                AND t.text NOT LIKE N'%waitfor delay%'
+                AND t.text NOT LIKE N'%waitfor receive%'
                 ORDER BY r.total_elapsed_time DESC
                 OPTION(MAXDOP 1, RECOMPILE);";
 
diff --git a/Lite/Services/LocalDataService.WaitStats.cs b/Lite/Services/LocalDataService.WaitStats.cs
index 46994844..f7f1a313 100644
--- a/Lite/Services/LocalDataService.WaitStats.cs
+++ b/Lite/Services/LocalDataService.WaitStats.cs
@@ -218,6 +218,8 @@ FROM v_query_snapshots
 AND collection_time = (SELECT MAX(collection_time) FROM v_query_snapshots WHERE server_id = $1)
 AND session_id > 50
 AND total_elapsed_time_ms >= $2
+AND query_text NOT LIKE '%waitfor delay%'
+AND query_text NOT LIKE '%waitfor receive%'
 ORDER BY total_elapsed_time_ms DESC
 LIMIT 5";