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#3637 sp_BlitzFirst deadlock warning #3638

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Merged
BrentOzar merged 1 commit into from
Apr 15, 2025
Merged

#3637 sp_BlitzFirst deadlock warning #3638

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9 changes: 5 additions & 4 deletions Documentation/sp_BlitzFirst_Checks_by_Priority.md
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Original file line number Diff line number Diff line change
Expand Up @@ -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: 50
If you want to add a new check, start at 51.
CURRENT HIGH CHECKID: 51
If you want to add a new check, start at 52.

| Priority | FindingsGroup | Finding | URL | CheckID |
|----------|---------------------------------|---------------------------------------|-------------------------------------------------|----------|
Expand Down Expand Up @@ -42,10 +42,11 @@ If you want to add a new check, start at 51.
| 50 | Server Performance | Too Much Free Memory | https://www.brentozar.com/go/freememory | 34 |
| 50 | Server Performance | Memory Grants pending | https://www.brentozar.com/blitz/memory-grants | 39 |
| 100 | In-Memory OLTP | Transactions aborted | https://www.brentozar.com/go/aborted | 32 |
| 100 | Query Problems | Suboptimal Plans/Sec High | https://www.brentozar.com/go/suboptimal | 33 |
| 100 | Query Problems | Bad Estimates | https://www.brentozar.com/go/skewedup | 42 |
| 100 | Query Problems | Skewed Parallelism | https://www.brentozar.com/go/skewedup | 43 |
| 100 | Query Problems | Deadlocks | https://www.brentozar.com/go/deadlocks | 51 |
| 100 | Query Problems | Query with a memory grant exceeding @MemoryGrantThresholdPct | https://www.brentozar.com/memory-grants-sql-servers-public-toilet/ | 46 |
| 100 | Query Problems | Skewed Parallelism | https://www.brentozar.com/go/skewedup | 43 |
| 100 | Query Problems | Suboptimal Plans/Sec High | https://www.brentozar.com/go/suboptimal | 33 |
| 200 | Wait Stats | (One per wait type) | https://www.brentozar.com/sql/wait-stats/#(waittype) | 6 |
| 210 | Potential Upcoming Problems | High Number of Connections |https://www.brentozar.com/archive/2014/05/connections-slow-sql-server-threadpool/ | 49 |
| 210 | Query Stats | Plan Cache Analysis Skipped | https://www.brentozar.com/go/topqueries | 18 |
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22 changes: 22 additions & 0 deletions sp_BlitzFirst.sql
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Expand Up @@ -3081,6 +3081,28 @@ If one of them is a lead blocker, consider killing that query.'' AS HowToStopit,
END;


/* Query Problems - Deadlocks - CheckID 51 */
IF (@Debug = 1)
BEGIN
RAISERROR('Running CheckID 51',10,1) WITH NOWAIT;
END

INSERT INTO #BlitzFirstResults (CheckID, Priority, FindingsGroup, Finding, URL, Details, HowToStopIt)
SELECT 51 AS CheckID,
100 AS Priority,
'Query Problems' AS FindingGroup,
'Deadlocks' AS Finding,
' https://www.brentozar.com/go/deadlocks' AS URL,
'Number of deadlocks during the sample: ' + CAST(ps.value_delta AS NVARCHAR(20)) + @LineFeed
+ 'Determined by sampling Perfmon counter ' + ps.object_name + ' - ' + ps.counter_name + @LineFeed AS Details,
'Check sp_BlitzLock to find which indexes and queries to tune.' AS HowToStopIt
FROM #PerfmonStats ps
WHERE ps.Pass = 2
AND counter_name = 'Number of Deadlocks/sec'
AND instance_name LIKE '_Total%'
AND value_delta > 0;


/* SQL Server Internal Maintenance - Log File Growing - CheckID 13 */
IF (@Debug = 1)
BEGIN
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