-- ===================================================================================================================
-- Collector: FileIoCollector ("file-io")
-- ===================================================================================================================
-- Hvad:        Kumulativ I/O og I/O-ventetid pr. data- og logfil, med drev/mount point. Reglerne bruger forskellen
--              mellem to målinger.
-- Fil:         src/SQLInsight.Collectors/Performance/FileIoCollector.cs
-- Interval:    5 min som standard (SQLInsight:CollectorIntervals:file-io)
-- Versioner:   SQL Server 2005 og nyere; drev fra 2008 R2 SP1
--
-- 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+
--   GRANT VIEW ANY DEFINITION TO [agent];              -- metadata; giver IKKE adgang til data
--
-- Bruges af:   SQLI-IO-001, SQLI-IO-002
-- Read-only:   Ja: kun SELECT samt 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 2008 og nyere: starttidspunkt
-- Kilde: FileIoCollector.StartTimeSql(2008+)
-- Kode:  src/SQLInsight.Collectors/Db.cs : Db.StartTimeSql(version)
SELECT (SELECT sqlserver_start_time FROM sys.dm_os_sys_info)
GO

-- Variant: SQL Server 2005: starttidspunkt
-- Kilde: FileIoCollector.StartTimeSql(2005)
-- Kode:  src/SQLInsight.Collectors/Db.cs : Db.StartTimeSql(version)
SELECT (SELECT create_date FROM sys.databases WHERE database_id = 2)
GO

-- Variant: SQL Server 2008 R2 SP1 og nyere (med drev/mount point)
-- Kilde: FileIoCollector.SqlWithVolumes
-- Kode:  src/SQLInsight.Collectors/Performance/FileIoCollector.cs : FileIoCollector.SqlWithVolumes
SELECT DB_NAME(vfs.database_id), vfs.file_id, mf.type_desc, mf.physical_name,
       vfs.num_of_reads, vfs.num_of_bytes_read, vfs.io_stall_read_ms,
       vfs.num_of_writes, vfs.num_of_bytes_written, vfs.io_stall_write_ms,
       vs.volume_mount_point
FROM sys.dm_io_virtual_file_stats(NULL, NULL) vfs
JOIN sys.master_files mf ON mf.database_id = vfs.database_id AND mf.file_id = vfs.file_id
OUTER APPLY sys.dm_os_volume_stats(vfs.database_id, vfs.file_id) vs
WHERE mf.type_desc IN (N'ROWS', N'LOG')
GO

-- Variant: SQL Server 2005 – 2008 R2 RTM
-- Kilde: FileIoCollector.Sql
-- Kode:  src/SQLInsight.Collectors/Performance/FileIoCollector.cs : FileIoCollector.Sql
SELECT DB_NAME(vfs.database_id), vfs.file_id, mf.type_desc, mf.physical_name,
       vfs.num_of_reads, vfs.num_of_bytes_read, vfs.io_stall_read_ms,
       vfs.num_of_writes, vfs.num_of_bytes_written, vfs.io_stall_write_ms,
       CAST(NULL AS nvarchar(260))
FROM sys.dm_io_virtual_file_stats(NULL, NULL) vfs
JOIN sys.master_files mf ON mf.database_id = vfs.database_id AND mf.file_id = vfs.file_id
WHERE mf.type_desc IN (N'ROWS', N'LOG')
GO