From 9284338f9a19733bf71858aaeb04210a8ed7ec73 Mon Sep 17 00:00:00 2001
From: Brent Ozar <brento@brentozar.com>
Date: Mon, 17 Nov 2025 04:50:14 -0800
Subject: [PATCH] #3741 sp_Blitz optimized locking

Warn if optimized locking is enabled but RCSI is not. Closes #3741.
---
 Documentation/sp_Blitz_Checks_by_Priority.md |  5 ++--
 sp_Blitz.sql                                 | 29 ++++++++++++++++++++
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/Documentation/sp_Blitz_Checks_by_Priority.md b/Documentation/sp_Blitz_Checks_by_Priority.md
index af9d6c66..950d11b8 100644
--- a/Documentation/sp_Blitz_Checks_by_Priority.md
+++ b/Documentation/sp_Blitz_Checks_by_Priority.md
@@ -6,8 +6,8 @@ Before adding a new check, make sure to add a Github issue for it first, and hav
 
 If you want to change anything about a check - the priority, finding, URL, or ID - open a Github issue first. The relevant scripts have to be updated too.
 
-CURRENT HIGH CHECKID: 271.
-If you want to add a new one, start at 272.
+CURRENT HIGH CHECKID: 272.
+If you want to add a new one, start at 273.
 
 | Priority | FindingsGroup | Finding | URL | CheckID |
 |----------|-----------------------------|---------------------------------------------------------|------------------------------------------------------------------------|----------|
@@ -87,6 +87,7 @@ If you want to add a new one, start at 272.
 | 100 | Performance | Many Plans for One Query | https://www.BrentOzar.com/go/parameterization | 160 |
 | 100 | Performance | Max Memory Set Too High | https://www.BrentOzar.com/go/max | 50 |
 | 100 | Performance | Memory Pressure Affecting Queries | https://www.BrentOzar.com/go/grants | 117 |
+| 100 | Performance | Optimized Locking Not Fully Set Up | https://www.BrentOzar.com/go/optimizedlocking | 272 |
 | 100 | Performance | Partitioned database with non-aligned indexes | https://www.BrentOzar.com/go/aligned | 72 |
 | 100 | Performance | Repetitive Maintenance Tasks | https://ola.hallengren.com | 181 |
 | 100 | Performance | Resource Governor Enabled | https://www.BrentOzar.com/go/rg | 10 |
diff --git a/sp_Blitz.sql b/sp_Blitz.sql
index 9f88d7ae..928f486a 100644
--- a/sp_Blitz.sql
+++ b/sp_Blitz.sql
@@ -4935,6 +4935,35 @@ AS
 						CLOSE DatabaseDefaultsLoop;
 						DEALLOCATE DatabaseDefaultsLoop;
 
+/* CheckID 272 - Performance - Optimized Locking Not Fully Set Up */
+IF EXISTS (SELECT * FROM sys.all_columns WHERE name = 'is_optimized_locking_on' AND object_id = OBJECT_ID('sys.databases'))
+			   AND NOT EXISTS ( SELECT  1
+							    FROM    #SkipChecks
+							    WHERE   DatabaseName IS NULL AND CheckID = 272 )
+				BEGIN
+					IF @Debug IN (1, 2) RAISERROR('Running CheckId [%d].', 0, 1, 272) WITH NOWAIT;
+						
+					INSERT    INTO [#BlitzResults]
+							( [CheckID] ,
+								[Priority] ,
+								[FindingsGroup] ,
+								[Finding] ,
+								[DatabaseName] ,
+								[URL] ,
+								[Details] )
+
+					SELECT
+					272 AS [CheckID] ,
+					100 AS [Priority] ,
+					'Performance' AS [FindingsGroup] ,
+					'Optimized Locking Not Fully Set Up' AS [Finding] ,
+					name,
+					'https://www.brentozar.com/go/optimizedlocking' AS [URL] ,
+					'RCSI should be enabled on this database to get the full benefits of optimized locking.'  AS [Details]
+					FROM sys.databases
+					WHERE is_optimized_locking_on = 1 AND is_read_committed_snapshot_on = 0;
+				END; 
+
 /* Check if target recovery interval <> 60 */
 IF
     @ProductVersionMajor >= 10