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.
npx agentmods add skills/starrocks/starrocks-debug-skills/compactionnpx skills add StarRocks/starrocks-debug-skills --skill compactiongit clone --depth 1 https://github.com/StarRocks/starrocks-debug-skillsWrote 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.
[](https://agentmods.dev/skills/starrocks/starrocks-debug-skills/compaction)<a href="https://agentmods.dev/skills/starrocks/starrocks-debug-skills/compaction"><img src="https://agentmods.dev/badge/skills/starrocks/starrocks-debug-skills/compaction.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00092 | $0.07557 |
| Opus 5 | $0.00046 | $0.03778 |
| Sonnet 5 | $0.00018 | $0.01511 |
| Haiku 4.5 | $0.00009 | $0.00756 |
Grade A, and why
compaction scanned grade A with 1 finding 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 5d ago.
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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- curl How it starts
The opening of the file, as written. The whole thing — 694 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Compaction Troubleshooting (Shared-Nothing)
This skill applies to shared-nothing deployments only. For shared-data, compaction is managed by the storage layer and diagnosed differently.
Three root causes account for the vast majority of cases:
- Cause A — import rate exceeds cumulative compaction throughput (rowset pile-up)
- Cause B — batch DELETE statements causing version explosion
- Cause C — large tablet where base compaction is not self-triggering
Metric Taxonomy — Read This First
Before using any metrics, understand the two-layer structure:
BE-level metrics (type-specific, per-node)
| Metric name | Meaning |
|---|---|
starrocks_be_tablet_cumulative_max_compaction_score |
Highest cumulative compaction score among all tablets on this BE, updated each scheduler round |
starrocks_be_tablet_base_max_compaction_score |
Highest base compaction score on this BE, updated each scheduler round |
starrocks_be_tablet_update_max_compaction_score |
Highest PK (update) compaction score on this BE. Not forwarded to FE. |
FE-level metric (aggregated, cross-node)
| Metric name | Meaning |
|---|---|
starrocks_fe_max_tablet_compaction_score |
Max of max(cumulative_score, base_score) across all BEs. ⚠️ Does NOT include update (PK) compaction score — update scores are never forwarded from BE to FE. |
How to retrieve metrics
Option 1 — curl the BE HTTP port (immediate, no Prometheus needed)
# Pull all compaction-related metrics from one BE
curl -s "http://<be_ip>:<be_http_port>/metrics" | grep -E "compaction_score|compaction_num"
# Targeted: cumulative, base, update scores on one BE
curl -s "http://<be_ip>:<be_http_port>/metrics" \
| grep -E "tablet_cumulative_max_compaction_score|tablet_base_max_compaction_score|tablet_update_max_compaction_score"
# Loop across all BEs (replace IPs and port as needed)
for be in 10.0.0.1 10.0.0.2 10.0.0.3; do
echo "=== $be ==="
curl -s "http://$be:8040/metrics" \
| grep -E "tablet_(cumulative|base|update)_max_compaction_score"
done
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.
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.
- 5d ago First seen · 694 lines · 92 tokens per session scan A 7ab4f8e50f01
compaction is a skill published in the GitHub repository StarRocks/starrocks-debug-skills (75 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 92 tokens to every session and 7,557 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
doris-debug-compaction
Use for Doris -235 / too many versions and compaction lag. Error raised in RowsetBuilder::checktabletversioncount when versioncount > maxtabletversionnum (default 2000) or meta serialize size limit.
storage-engine-selector
Select the right storage engine architecture (LSM-tree, B-tree, or in-memory) for a database workload using a 7-dimensional scored trade-off analysis. Use when evaluating RocksDB vs InnoDB vs LevelDB, diagnosing write amplification in production, choosing between write-optimized vs read-optimized storage, selecting a…
schema-exploration
Lists tables, describes columns and data types, identifies foreign key relationships, and maps entity relationships in a database. Use when the user asks about database schema, table structure, column types, what tables exist, ERD, foreign keys, or how entities relate.
debugging
How to debug tursodb using Bytecode comparison, logging, ThreadSanitizer, deterministic simulation, and corruption analysis tools.
sdk-design
Doctrine for designing and evolving any SDK Grida ships — TypeScript, Rust, or otherwise. "SDK" here means a surface that crosses a foreign-or-foreign-treated boundary: published packages, separately-versioned consumers, FFI bindings, public-by-design modules. An SDK's job is to refuse; a strict, honest surface…
ha-data-stores
Map of Hope Agent's local data stores and safe read-only query workflow. Use when the user asks where Hope Agent stores data, wants to inspect sessions/messages/memory/logs/background jobs/knowledge indexes/settings, asks the model to query local app data, or debugging requires checking persisted state. Trigger…