Søren Eggert Lundsteen Olsen
66aa47ecb3
The 2012+ query used SELECT ... INTO #system_health, a write to tempdb. One SELECT with ROW_NUMBER() now returns the deadlock rows and the newest row (the read position) in the same pass. SQL Scripts and the read-only test no longer allow any exception. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
41 lines
2.7 KiB
Transact-SQL
41 lines
2.7 KiB
Transact-SQL
-- ===================================================================================================================
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-- Collector: DeadlockCollector ("deadlocks")
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-- ===================================================================================================================
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-- Hvad: Nye deadlock-grafer (xml_deadlock_report) fra den indbyggede system_health-session.
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-- Fil: src/SQLInsight.Collectors/Concurrency/DeadlockCollector.cs
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-- Interval: 5 min som standard (SQLInsight:CollectorIntervals:deadlocks)
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-- Versioner: SQL Server 2008 og nyere (filer fra 2012, ellers ring buffer)
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--
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-- Rettigheder til agentens login (se db/permissions/grant-least-privilege.sql; [agent] = agentens login):
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-- GRANT VIEW SERVER STATE TO [agent]; -- SQL Server 2005-2019
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-- GRANT VIEW SERVER PERFORMANCE STATE TO [agent]; -- SQL Server 2022+ (erstatter VIEW SERVER STATE)
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-- GRANT VIEW SERVER SECURITY STATE TO [agent]; -- SQL Server 2022+
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--
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-- Bruges af: SQLI-DLK-001
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-- Read-only: Ja: kun SELECT (sys.fn_xe_file_target_read_file og DMV'er) samt SET-sessionsindstillinger. Ingen
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-- temp-tabeller; læsepositionen findes med ROW_NUMBER() i samme forespørgsel.
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-- Kørsel: Kør i SSMS som agentens login. Hver variant er sin egen batch (GO); en variant for en anden SQL Server-version
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-- end din kan fejle - det er forventet. Agenten kører altid med sessionsindstillingerne i _collectors/InstanceProbe.sql.
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-- ===================================================================================================================
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-- Variant: SQL Server 2012 og nyere (system_health-filer; første læsning)
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-- Kilde: DeadlockCollector.BuildFileSql
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-- Kode: src/SQLInsight.Collectors/Concurrency/DeadlockCollector.cs : DeadlockCollector.BuildFileSql(lastFile: null, lastOffset: null)
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SELECT e.event_data, e.file_name, e.file_offset, e.rn
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FROM (
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SELECT CASE WHEN object_name = N'xml_deadlock_report' THEN CAST(event_data AS nvarchar(max)) END AS event_data,
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file_name, file_offset,
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ROW_NUMBER() OVER (ORDER BY file_name DESC, file_offset DESC) AS rn
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FROM sys.fn_xe_file_target_read_file(N'system_health*.xel', NULL, NULL, NULL)
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) AS e
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WHERE e.event_data IS NOT NULL OR e.rn = 1;
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GO
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-- Variant: SQL Server 2008 – 2008 R2, og når event-filerne ikke kan læses
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-- Kilde: DeadlockCollector.RingBufferSql
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-- Kode: src/SQLInsight.Collectors/Concurrency/DeadlockCollector.cs : DeadlockCollector.RingBufferSql
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SELECT CAST(t.target_data AS nvarchar(max))
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FROM sys.dm_xe_session_targets t
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JOIN sys.dm_xe_sessions s ON s.address = t.event_session_address
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WHERE s.name = N'system_health' AND t.target_name = N'ring_buffer'
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GO
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