cpu-saturation

cpu-saturation is a skill for Claude Code, Codex from StarRocks/starrocks-debug-skills. It costs 96 tokens per session (7,244 once invoked), scanned C, original, Apache-2.0.

A first-response guide for high CPU use on StarRocks frontend or backend hosts. It identifies whether the load comes from queries, imports, compaction, background work, garbage collection, or unrelated operating-system processes.

In plain words
What is it for?
Use it to collect CPU breakdowns, load averages, per-process samples, and related metrics, then hand the case to the appropriate investigation guide.
Why use it?
High CPU alone does not show which workload is responsible, and waiting for the wrong subsystem to fix it wastes time. The guide uses operating-system and StarRocks signals to attribute the load before deeper troubleshooting.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Good fit Use it to collect CPU breakdowns, load averages, per-process samples, and related metrics, then hand the case to the appropriate investigation guide.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/starrocks/starrocks-debug-skills/cpu-saturation
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add StarRocks/starrocks-debug-skills --skill cpu-saturation
Clone the repo
git clone --depth 1 https://github.com/StarRocks/starrocks-debug-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cpu-saturation

README.md
[![agentmods](https://agentmods.dev/badge/skills/starrocks/starrocks-debug-skills/cpu-saturation.svg)](https://agentmods.dev/skills/starrocks/starrocks-debug-skills/cpu-saturation)
Your own site
<a href="https://agentmods.dev/skills/starrocks/starrocks-debug-skills/cpu-saturation"><img src="https://agentmods.dev/badge/skills/starrocks/starrocks-debug-skills/cpu-saturation.svg" alt="Measured on agentmods" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,244 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00096 $0.07244
Opus 5 $0.00048 $0.03622
Sonnet 5 $0.00019 $0.01449
Haiku 4.5 $0.00010 $0.00724

Measured 8d ago against content hash 91b8390d2efc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade C, and why

cpu-saturation scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/analyze_logs.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -s http://<BE_IP>:<BE_HTTP_PORT>/api/running_load | python3 -m json.tool 2>/dev/null

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- curl
cpu-saturation/SKILL.md · 640 lines

How it starts

The opening of the file, as written. The whole thing — 640 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CPU Saturation Triage

Investigation guide for BE or machine CPU saturation. This skill focuses on attribution: which process, which module, and which workload is consuming CPU. After attribution, follow the referenced deep-dive skill for root-cause analysis.


Metric Taxonomy — Read This First

Before using the decision tree, establish what the CPU is doing and which process owns it.

OS-level CPU indicators

Metric Meaning
us (user) in top User-space CPU — StarRocks computation, compression
sy (system) in top Kernel CPU — system calls, IO, interrupts; high sy with us suggests thread overhead
wa (iowait) in top CPU waiting for disk IO — not CPU saturation, disk bottleneck
st (steal) in top CPU stolen by hypervisor (VM environments only) — noisy neighbor
Load average Running + runnable threads; >vCPU count indicates oversubscription

How to retrieve:

# Snapshot CPU breakdown
top -b -n 1 | head -5
# Output: %Cpu(s): 85.2 us,  8.3 sy,  0.0 ni,  3.1 id,  2.1 wa,  0.0 hi,  1.3 si,  0.0 st

# Per-process CPU (10-second sample)
pidstat -u 2 5

# Load average vs CPU count
uptime
# Load average: 64.2, 58.1, 52.3 → compare to: nproc (e.g., 32 CPUs → overloaded)
nproc

BE-level CPU classification metrics (v3.4+)

Metric Meaning
starrocks_be_cpu_task_query CPU time consumed by query pipeline threads
starrocks_be_cpu_task_load CPU time consumed by import/flush threads
starrocks_be_cpu_task_compaction CPU time consumed by compaction threads
starrocks_be_cpu_task_clone CPU time consumed by tablet clone (rebalance)

How to retrieve:

# Pull all BE CPU task metrics
curl -s "http://<be_host>:<be_http_port>/metrics" | grep "starrocks_be_cpu"

# Loop across all BEs to find the hotspot node
for be in <be1> <be2> <be3>; do
    echo "=== $be ==="
    curl -s "http://$be:8040/metrics" | grep "starrocks_be_cpu_task"
done

FE-level CPU indicators

Read the full file on GitHub · 640 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 640 lines · 96 tokens per session scan C 91b8390d2efc

Subscribe to this mod's changes

cpu-saturation is a skill published in the GitHub repository StarRocks/starrocks-debug-skills (75 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 96 tokens to every session and 7,244 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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