-- ===================================================================================================================
-- Collector: CpuCollector ("cpu")
-- ===================================================================================================================
-- Hvad:        SQL Servers og systemets CPU-forbrug pr. minut (scheduler monitor ring buffer, op til 60 minutter).
-- Fil:         src/SQLInsight.Collectors/Performance/CpuCollector.cs
-- Interval:    5 min som standard (SQLInsight:CollectorIntervals:cpu)
-- Versioner:   SQL Server 2005 og nyere
--
-- Rettigheder til agentens login (se db/permissions/grant-least-privilege.sql; [agent] = agentens login):
--   GRANT VIEW SERVER STATE TO [agent];                -- SQL Server 2005-2019
--   GRANT VIEW SERVER PERFORMANCE STATE TO [agent];    -- SQL Server 2022+ (erstatter VIEW SERVER STATE)
--   GRANT VIEW SERVER SECURITY STATE TO [agent];       -- SQL Server 2022+
--
-- Bruges af:   SQLI-CPU-001, SQLI-ANOM-001
-- Read-only:   Ja: kun SELECT samt lokale variabler, SET-sessionsindstillinger. Intet ændrer data, indstillinger
--              eller objekter.
-- Kørsel:     Kør i SSMS som agentens login. Hver variant er sin egen batch (GO); en variant for en anden SQL Server-version
--             end din kan fejle - det er forventet. Agenten kører altid med sessionsindstillingerne i _collectors/InstanceProbe.sql.
-- ===================================================================================================================

-- Variant: SQL Server 2005 og nyere
-- Kilde: CpuCollector.Sql
-- Kode:  src/SQLInsight.Collectors/Performance/CpuCollector.cs : CpuCollector.Sql
DECLARE @now_ticks bigint;
SELECT @now_ticks = ms_ticks FROM sys.dm_os_sys_info;
SELECT TOP (60)
    DATEADD(second, CAST((rb.[timestamp] - @now_ticks) / 1000 AS int), GETUTCDATE()),
    rb.record.value('(./Record/SchedulerMonitorEvent/SystemHealth/ProcessUtilization)[1]', 'int'),
    rb.record.value('(./Record/SchedulerMonitorEvent/SystemHealth/SystemIdle)[1]', 'int')
FROM (
    SELECT [timestamp], CONVERT(xml, record) AS record
    FROM sys.dm_os_ring_buffers
    WHERE ring_buffer_type = N'RING_BUFFER_SCHEDULER_MONITOR' AND record LIKE N'%<SystemHealth>%'
) rb
ORDER BY rb.[timestamp] DESC
GO

-- Variant: SQL Server 2017 og nyere (Windows eller Linux)
-- Kilde: CpuCollector.HostPlatformSql
-- Kode:  src/SQLInsight.Collectors/Performance/CpuCollector.cs : CpuCollector.HostPlatformSql
SELECT host_platform FROM sys.dm_os_host_info
GO