optimize-high-cardinality SKILL.md skillA
optimize-high-cardinality from prometheus/prometheus-mcp is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add prometheus/prometheus-mcp/optimize-high-cardinality@git:20260721.4db318bPins git:20260721.4db318b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- prometheus/prometheus-mcp
- Path
pkg/mcp/assets/skills/optimize-high-cardinality/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260721.4db318b, committed Jul 21, 2026
- Size
- 2,187 bytes
- Repository stars
- 138
- License
- Apache-2.0
Find and reduce high-cardinality metrics and labels. Use when series counts or memory grow, queries slow down, or tsdb_stats shows label explosions; pinpoints offending labels and proposes relabeling, dropping, and aggregation fixes.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Exploring, Identifying, and Optimizing High-Cardinality Metrics Cardinality (the number of unique label combinations) drives Prometheus memory, storage, and query cost. Find the metrics and labels responsible for series explosions and propose fixes that keep the signal while shedding the cost. ## Getting oriented - tsdb_stats is the primary instrument: seriesCountByMetricName ranks the biggest metrics, labelValueCountByLabelName exposes labels with huge value sets, and memoryInBytesByLabelName shows what they cost. - series and label_values let you inspect a suspect metric's actual label combinations and values. - targets_metadata shows which targets expose a metric, i.e. where a fix would need to be applied. - Prometheus's own TSDB metrics track cardinality live: range_query prometheus_tsdb_head_series for overall growth, rate(prometheus_tsdb_head_series_created_total[5m]) for churn, and topk(10, scrape_series_added) to attribute new series to the targets creating them. ## Topics worth exploring Treat these as starting points and follow the biggest numbers: - Which label drives a metric's cardinality: compare per-label series counts, e.g. with query: …
Read the whole file at its exact version.
How to install
mdr add prometheus/prometheus-mcp/optimize-high-cardinality@sha256:5a325523ec1d2e69The line at the top of this page pins the label git:20260721.4db318b, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ya3wzm3z47ux6rkk)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 21, 2026.
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 (2187 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
prometheus/prometheus-mcp · 138 stars · license Apache-2.0 · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ya3wzm3z47ux6rkk GET https://markdownregistry.com/api/v1/resolve?ref=prometheus/prometheus-mcp/optimize-high-cardinality GET https://markdownregistry.com/api/v1/blob/5a325523ec1d2e6916eadb80601175e46d7709a341599304d693a5b939fcda4f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.