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 skills add Altinity/altinity-skills --skill altinity-expert-clickhouse-memorygit clone --depth 1 https://github.com/Altinity/altinity-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/altinity/altinity-skills/altinity-expert-clickhouse-memory)<a href="https://agentmods.dev/skills/altinity/altinity-skills/altinity-expert-clickhouse-memory"><img src="https://agentmods.dev/badge/skills/altinity/altinity-skills/altinity-expert-clickhouse-memory.svg" alt="Measured on agentmods" 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 | $0.00037 | $0.00505 |
| Opus 5 | $0.00018 | $0.00253 |
| Sonnet 5 | $0.00007 | $0.00101 |
| Haiku 4.5 | $0.00004 | $0.00051 |
Grade A, and why
altinity-expert-clickhouse-memory 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 8d 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.
What it actually says
Memory Usage and OOM Diagnostics
Diagnose RAM usage, memory pressure, OOM risks, and memory allocation patterns.
Diagnostics
Run all queries from checks.sql in this skill's directory and analyze the results.
Problem Investigation
High Memory from Aggregations
Solutions:
- Add
max_bytes_before_external_group_by - Use
max_threadspragma to limit parallelism - Restructure query to reduce group by cardinality
High Memory from JOINs
Solutions:
- Use
max_bytes_in_join - Consider
join_algorithm = 'partial_merge'or'auto' - Ensure smaller table on right side
Ad-Hoc Query Guidelines
Required Safeguards
-- Always time-bound log queries
where event_date >= today() - 1
-- Limit results
limit 100
Memory-Related Metrics
MemoryTracking- current tracked memoryMemoryResident- RSSOSMemoryTotal,OSMemoryFreeWithoutCached- system memory
Cross-Module Triggers
| Finding | Load Module | Reason |
|---|---|---|
| High merge memory | altinity-expert-clickhouse-merges |
Analyze merge patterns |
| Large dictionaries | altinity-expert-clickhouse-dictionaries |
Dictionary optimization |
| Cache too large | altinity-expert-clickhouse-caches |
Cache sizing |
| PK memory high | altinity-expert-clickhouse-schema |
ORDER BY optimization |
| Query OOMs | altinity-expert-clickhouse-reporting |
Query optimization |
Settings Reference
| Setting | Scope | Notes |
|---|---|---|
max_memory_usage |
Query | Per-query limit |
max_memory_usage_for_user |
User | Per-user aggregate |
max_server_memory_usage |
Server | Global limit |
max_server_memory_usage_to_ram_ratio |
Server | Auto-limit as % of RAM |
max_bytes_before_external_group_by |
Query | Spill aggregation to disk |
max_bytes_in_join |
Query | Spill join to disk |
What ships with it
1 file 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.
- 8d ago First seen · 77 lines · 37 tokens per session scan A 47fd8ea86d34
altinity-expert-clickhouse-memory is a skill published in the GitHub repository Altinity/altinity-skills (16 stars, last pushed 11d ago), licensed Apache-2.0. It adds 37 tokens to every session and 505 once invoked, about $0.0002 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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