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/apache/doris-skills/compactionnpx skills add apache/doris-skills --skill compactiongit clone --depth 1 https://github.com/apache/doris-skillsWhat 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 | $0.00053 | $0.00624 |
| Opus 5 | $0.00026 | $0.00312 |
| Sonnet 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 2d 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.
- 2d 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 (37 stars, last pushed 12d ago), licensed Apache-2.0. It adds 53 tokens to every session and 624 once invoked, about $0.0003 per session on Opus 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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