Apache Doris Skills is a collection of agent instructions containing Apache Doris database knowledge for designing, sizing, operating, diagnosing, and contributing to Doris clusters. It serves developers and operators using Claude Code, Cursor, Codex, Cline, Amp, and other agent tools, with the skills providing decision logic and evidence-based workflows.
Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/apache/doris-skillsnpx agentmods add skills/apache/doris-skills/compactionWrote 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/apache/doris-skills/compaction)<a href="https://agentmods.dev/skills/apache/doris-skills/compaction"><img src="https://agentmods.dev/badge/skills/apache/doris-skills/compaction/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/apache/doris-skills/compaction"><img src="https://agentmods.dev/badge/skills/apache/doris-skills/compaction.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 5.1 | $0.00053 | $0.00624 |
| Opus 5.5 | $0.00021 | $0.00250 |
| Sonnet 5.5 | $0.00011 | $0.00125 |
| Haiku 4.5 | $0.00005 | $0.00062 |
Grade A, and why
doris-debug-compaction scanned grade A with 0 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 1mo 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Compaction / Versions
Code
be/src/storage/rowset_builder.cpp:
version_count > max_version_config→Status::Error<TOO_MANY_VERSION>(...)- Suggests reduce load frequency or raise
max_tablet_version_num/time_series_max_tablet_version_numinbe.conf - Near limit triggers cumulative compaction submit
Defaults (config.cpp): max_tablet_version_num=2000, time_series_max_tablet_version_num=20000.
Causes
| ID | Cause | Evidence | Fix direction |
|---|---|---|---|
| A | Ingest rate > compaction throughput | version_count rising; compaction score growing | Reduce ingest frequency or increase compaction threads |
| B | Disk IO bottleneck | iostat shows disk util > 90% |
Move WAL to separate disk; add compaction disks |
| C | max_tablet_version_num too low for workload | -235 on normal ingest rates | Raise limit (temporary), then fix root cause |
| D | Single-tablet hotspot | One tablet has 10× versions of peers | Partition / bucket key skew |
Actions
- Confirm with
./scripts/doris-debug log-grep be/log --pack versions - Check compaction throughput:
./scripts/doris-debug be-metrics --be http://$BE:8040 --grep compaction - Check disk IO:
iostat -x 1 - Slow ingest / enlarge group commit batches
- Raising
max_tablet_version_numis a temporary valve — fix ingest vs compaction balance
./scripts/doris-debug be-metrics --be http://$BE:8040 --grep compaction
Compaction knobs
# be.conf
max_tablet_version_num = 2000 # hard cap, raise only as stopgap
time_series_max_tablet_version_num = 20000 # separate cap for time-series tables
max_cumulative_compaction_threads = -1 # -1 = auto based on CPU cores
compaction_task_num_per_disk = 4 # per-disk concurrent compaction tasks
compaction_tablet_size_threshold = 107374182400 # 100GB — above this, skip base compaction
Source
be/src/storage/rowset_builder.cpp—-235errorbe/src/common/config.cpp— all compaction config defaultsbe/src/olap/cumulative_compaction_policy.cpp— score calculation
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.
- 1mo ago First seen · 61 lines · 53 tokens per session scan A 9c71413286ad
doris-debug-compaction is a skill published in the GitHub repository apache/doris-skills (47 stars, last pushed 17d ago), licensed Apache-2.0. It adds 53 tokens to every session and 624 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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