-- ===================================================================================================================
-- SQLI-CFG-001: max server memory er ikke sat
-- ===================================================================================================================
-- Regel-id:    SQLI-CFG-001
-- Titel:       max server memory er ikke sat
-- Alvor:       High
-- Versioner:   Alle (SQL Server 2000 og nyere). Ikke relevant på Azure SQL Managed Instance.
--
-- Hvad tjekkes, og hvorfor:
--   Om 'max server memory (MB)' står på standardværdien, så SQL Server kan tage al hukommelse og presse Windows til
--   paging.
--
-- Vurdering (sker i C# ud fra de indsamlede data, ikke i SQL'en, medmindre andet er nævnt):
--   Fund hvis value_in_use for 'max server memory (MB)' (ConfigurationCollector) er >= 2147483647. Den anbefalede
--   værdi i fundet beregnes af fysisk hukommelse (ServerCollector): max(fysisk / 2, fysisk - max(4096 MB, 10 % af
--   fysisk)).
--
-- Grænseværdier (konfigurationsnøgle i agentens appsettings.json og standardværdi):
--   Standardværdien 2147483647 (int.MaxValue). Reserve til Windows: det største af 4096 MB og 10 %
--   (MemoryGuidance.Reserve, fast i koden).
--
-- 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+
--   SQL Server 2000 har ikke VIEW SERVER STATE; se docs/legacy-versions.md (fx kræver DBCC SQLPERF(WAITSTATS) forhøjede rettigheder).
--
-- Data kommer fra (collector, fil : medlemmer, interval):
--   ConfigurationCollector
--     Fil: src/SQLInsight.Collectors/Instance/ConfigurationCollector.cs
--     Medlemmer: ConfigurationCollector.Sql2005, ConfigurationCollector.Sql2000
--     Interval: 15 min som standard (SQLInsight:CollectorIntervals:configuration)
--     Delt script: SQL Scripts/_collectors/ConfigurationCollector.sql
--   ServerCollector
--     Fil: src/SQLInsight.Collectors/Instance/ServerCollector.cs
--     Medlemmer: ServerCollector.BuildSql(version), Db.StartTimeSql(version), ServerCollector.Sql2000
--     Interval: 15 min som standard (SQLInsight:CollectorIntervals:server)
--     Delt script: SQL Scripts/_collectors/ServerCollector.sql
-- Regelkode:   src/SQLInsight.Rules/Configuration/ConfigurationRules.cs : MaxServerMemoryDefaultRule.Evaluate
--
-- Read-only:   Ja: kun SELECT samt xp_msver (læser versionsoplysninger), SET-sessionsindstillinger. Intet ændrer
--              data, indstillinger eller objekter.
-- Kørsel:      Kør i SSMS som agentens login (eller et login med samme rettigheder). Hver variant er sin egen batch
--              (GO); en variant for en anden SQL Server-version end din kan fejle - det er forventet.
--              Per-database-forespørgsler er vist for databasen msdb, som findes overalt: ret navnet til den
--              database, du vil se.
-- ===================================================================================================================

-- -------------------------------------------------------------------------------------------------------------------
-- Forbindelsen: Sessionsindstillinger, agenten sætter på hver forbindelse
-- -------------------------------------------------------------------------------------------------------------------

-- Variant: Alle versioner: sættes på hver forbindelse, agenten åbner
-- Kilde: SqlConnectionFactory.SessionSettings
-- Kode:  src/SQLInsight.Connectivity/SqlConnectionFactory.cs : SqlConnectionFactory.SessionSettings
SET LOCK_TIMEOUT 5000; SET DEADLOCK_PRIORITY LOW; SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
GO

-- -------------------------------------------------------------------------------------------------------------------
-- ConfigurationCollector: sp_configure: konfigureret værdi og værdi i brug for alle serverindstillinger.
-- -------------------------------------------------------------------------------------------------------------------

-- Variant: SQL Server 2005 og nyere
-- Kilde: ConfigurationCollector.Sql2005
-- Kode:  src/SQLInsight.Collectors/Instance/ConfigurationCollector.cs : ConfigurationCollector.Sql2005
SELECT name, CAST(value AS bigint), CAST(value_in_use AS bigint) FROM sys.configurations
GO

-- Variant: SQL Server 2000 (legacy ODBC-sti)
-- Kilde: ConfigurationCollector.Sql2000
-- Kode:  src/SQLInsight.Collectors/Instance/ConfigurationCollector.cs : ConfigurationCollector.Sql2000
SELECT v.name, CAST(c.value AS bigint), CAST(r.value AS bigint)
FROM master.dbo.spt_values v
JOIN master.dbo.sysconfigures c ON c.config = v.number
JOIN master.dbo.syscurconfigs r ON r.config = v.number
WHERE v.type = 'C'
GO

-- -------------------------------------------------------------------------------------------------------------------
-- ServerCollector: Starttidspunkt, logiske CPU'er, schedulers, NUMA-noder, fysisk hukommelse og virtualisering.
-- -------------------------------------------------------------------------------------------------------------------

-- Variant: SQL Server 2012 og nyere
-- Kilde: ServerCollector.BuildSql(2012+)
-- Kode:  src/SQLInsight.Collectors/Instance/ServerCollector.cs : ServerCollector.BuildSql(version)
SELECT
    (SELECT sqlserver_start_time FROM sys.dm_os_sys_info),
    cpu_count,
    (SELECT COUNT(*) FROM sys.dm_os_schedulers WHERE status = N'VISIBLE ONLINE'),
    (SELECT COUNT(DISTINCT parent_node_id) FROM sys.dm_os_schedulers WHERE status = N'VISIBLE ONLINE'),
    physical_memory_kb / 1024,
    virtual_machine_type_desc
FROM sys.dm_os_sys_info
GO

-- Variant: SQL Server 2008 R2 SP1 og senere 2008 R2-builds
-- Kilde: ServerCollector.BuildSql(2008 R2 SP1)
-- Kode:  src/SQLInsight.Collectors/Instance/ServerCollector.cs : ServerCollector.BuildSql(version)
SELECT
    (SELECT sqlserver_start_time FROM sys.dm_os_sys_info),
    cpu_count,
    (SELECT COUNT(*) FROM sys.dm_os_schedulers WHERE status = N'VISIBLE ONLINE'),
    (SELECT COUNT(DISTINCT parent_node_id) FROM sys.dm_os_schedulers WHERE status = N'VISIBLE ONLINE'),
    physical_memory_in_bytes / 1048576,
    virtual_machine_type_desc
FROM sys.dm_os_sys_info
GO

-- Variant: SQL Server 2008 og 2008 R2 før SP1
-- Kilde: ServerCollector.BuildSql(2008)
-- Kode:  src/SQLInsight.Collectors/Instance/ServerCollector.cs : ServerCollector.BuildSql(version)
SELECT
    (SELECT sqlserver_start_time FROM sys.dm_os_sys_info),
    cpu_count,
    (SELECT COUNT(*) FROM sys.dm_os_schedulers WHERE status = N'VISIBLE ONLINE'),
    (SELECT COUNT(DISTINCT parent_node_id) FROM sys.dm_os_schedulers WHERE status = N'VISIBLE ONLINE'),
    physical_memory_in_bytes / 1048576,
    CAST(NULL AS nvarchar(60))
FROM sys.dm_os_sys_info
GO

-- Variant: SQL Server 2005
-- Kilde: ServerCollector.BuildSql(2005)
-- Kode:  src/SQLInsight.Collectors/Instance/ServerCollector.cs : ServerCollector.BuildSql(version)
SELECT
    (SELECT create_date FROM sys.databases WHERE database_id = 2),
    cpu_count,
    (SELECT COUNT(*) FROM sys.dm_os_schedulers WHERE status = N'VISIBLE ONLINE'),
    (SELECT COUNT(DISTINCT parent_node_id) FROM sys.dm_os_schedulers WHERE status = N'VISIBLE ONLINE'),
    physical_memory_in_bytes / 1048576,
    CAST(NULL AS nvarchar(60))
FROM sys.dm_os_sys_info
GO

-- Variant: SQL Server 2000 (legacy ODBC-sti): starttidspunkt
-- Kilde: ServerCollector.StartTimeSql(2000)
-- Kode:  src/SQLInsight.Collectors/Db.cs : Db.StartTimeSql(version)
SELECT (SELECT login_time FROM master.dbo.sysprocesses WHERE spid = 1)
GO

-- Variant: SQL Server 2000 (legacy ODBC-sti): CPU og hukommelse
-- Kilde: ServerCollector.Sql2000
-- Kode:  src/SQLInsight.Collectors/Instance/ServerCollector.cs : ServerCollector.Sql2000
EXEC master.dbo.xp_msver
GO