sqlblocking-review skillA
sqlblocking-review is agent-read markdown (skill) from vanterx/mssql-performance-skills: Analyze SQL Server lock blocking from sys.dm_exec_requests, sys.dm_exec_sessions, sys.dm_os_waiting_tasks, sys.dm_tran_locks, open-transaction DMVs, blocked process reports, index operational stats, Query Store lock waits, and community tool output such as sp_WhoIsActive, sp_BlitzWho and sp_HumanEvents. Applies 54 checks (BL1–BL54) covering blocking chain topology and head-blocker identification, head-blocker state classification against the six documented blocking scenarios, lock-level evidence.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# SQL Server Blocking Review Skill ## Purpose Identify the head of a blocking chain, explain why it holds its locks, and give a ranked remediation path. Applies 54 checks (BL1–BL54) across eight categories: - **BL1–BL7** — Blocking chain topology: head blocker identification, block duration, chain depth, fan-out, cross-database chains, concurrency exhaustion, and chronic recurrence across captures - **BL8–BL15** — Head-blocker state classification: maps the head blocker to the documented blocking scenarios (long-running query, sleeping session with an open transaction, orphaned transaction, rollback, client not fetching results, client/server distributed deadlock), plus non-lock waits and maintenance work at the head - **BL16–BL23** — Lock-level evidence: lock escalation to table locks, schema modification locks, hot resource contention, key-range locks, lock conversion waits, application locks, and lock footprint size …
Read the whole file at its exact version.
How to install
mdr add vanterx/mssql-performance-skills/sqlblocking-review@git:20260919.8a7bf7emdr add vanterx/mssql-performance-skills/sqlblocking-review@sha256:5626667352467e02Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_dnc5w553ojuwhrqn)
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Versions
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (78000 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
vanterx/mssql-performance-skills · 5 stars · license MIT · pushed 2026-09-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dnc5w553ojuwhrqn GET https://markdownregistry.com/api/v1/resolve?ref=vanterx/mssql-performance-skills/sqlblocking-review GET https://markdownregistry.com/api/v1/blob/5626667352467e02a3c967310df555e766674e3cb59627d278939a19a251d418
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