CollectorContext carries the instance's DatabaseSelection; the database,
index, Query Store and community-rule collectors skip databases that are not
chosen (system databases always run). DatabaseDiscovery lists every database
with state, size, recovery model, compatibility level and access, and
recognises Dynamics AX with the same signature as the AX rules, through
three-part names only (2000 and 2005+ variants). PermissionCheck reports which
rights from grant-least-privilege.sql the login has (HAS_PERMS_BY_NAME,
version-aware; not possible on 2000).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
The index collector now sums index reads and writes between collections
across restarts of SQL Server (and of the agent, by seeding from the
stored snapshot) and keeps them per day in insight.IndexUsageDaily
(migration 0015, HourlyDays). SQLI-IDX-002 judges an index once it has
been followed for 7 days instead of needing 7 days of uptime.
GET /api/v1/instances/{name}/index-usage lists usage per index.
SQLI-STAT-001 also reports statistics that were never updated on tables
with rows; statistic rows now come from the table's heap or clustered
index, as a never-updated statistic has no row count of its own.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Collector (every 6 h, metadata and DMVs only, no scans): index inventory
with usage and forwarded fetches, missing-index suggestions, statistics
modifications via sysindexes.rowmodctr (needs only metadata visibility).
Rules:
- SQLI-IDX-001 missing index, evaluated against existing indexes:
extends an index with the same keys instead of adding one; notes on
write-heavy tables, many indexes, wide includes, short uptime
- SQLI-IDX-002 unused index (needs 7 days of uptime; suggests DISABLE)
- SQLI-IDX-003 duplicate or covered index (filters, uniqueness respected)
- SQLI-IDX-004 heap with forwarded records
- SQLI-STAT-001 stale statistics, SQLI-STAT-002 auto statistics off
Column lists use U+E000 as separator: FOR XML cannot serialize NCHAR(1).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E3EExwndy8Z22EK2Qpt6BK
