sqlinsight-pro/SQL Scripts/_collectors/PlanCacheCollector.sql
Søren Eggert Lundsteen Olsen 2284e7f082 SQL Scripts: one reviewable script per rule
A DBA should be able to review every statement SQLInsight sends to a
monitored server before granting it access. "SQL Scripts/<rule-id>.sql"
holds, per rule (82 built-in, 16 community), a Danish header (what and
why, how C# judges the data, thresholds with config keys, severity,
exact GRANTs, versions, collector file and member) and the collector's
SQL verbatim, every version variant as its own batch.
"_collectors/<Collector>.sql" holds each collector's queries once.

The only statement that is not strictly read-only is documented in the
scripts: the deadlock collector's session temp table (#system_health).

Inline SQL in the collectors moved to internal constants and Build*Sql
methods (no text changed), so SqlScriptTests can check that the scripts
still contain the SQL the code sends, that every rule has a script, that
every collector query is registered, and that nothing writes.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-10-02 13:20:06 +02:00

29 lines
1.9 KiB
Transact-SQL

-- ===================================================================================================================
-- Collector: PlanCacheCollector ("plan-cache")
-- ===================================================================================================================
-- Hvad: Plan cache: antal og størrelse af planer og af ad hoc-planer brugt én gang.
-- Fil: src/SQLInsight.Collectors/Instance/PlanCacheCollector.cs
-- Interval: 15 min som standard (SQLInsight:CollectorIntervals:plan-cache)
-- 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-CFG-005
-- 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 2005 og nyere
-- Kilde: PlanCacheCollector.Sql
-- Kode: src/SQLInsight.Collectors/Instance/PlanCacheCollector.cs : PlanCacheCollector.Sql
SELECT
COUNT_BIG(*),
ISNULL(SUM(CAST(size_in_bytes AS bigint)), 0) / 1048576.0,
ISNULL(SUM(CASE WHEN objtype = N'Adhoc' AND usecounts = 1 THEN 1 ELSE 0 END), 0),
ISNULL(SUM(CASE WHEN objtype = N'Adhoc' AND usecounts = 1 THEN CAST(size_in_bytes AS bigint) ELSE 0 END), 0) / 1048576.0
FROM sys.dm_exec_cached_plans
GO