qdrant-scaling-query-volume

A guide to handling Qdrant queries that request many search results or fetch large numbers of vectors. Qdrant is a database for searching vector representations of data.

In plain words
What is it for?
Use it to plan high-limit searches, scrolling, and pagination across multiple automatically sharded collections, while weighing transfer savings against a small chance of incomplete results.
Why use it?
It explains how querying every shard for the full result limit can create unnecessary data transfer and merging work.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/secondlifes/code-intel/scaling-query-volume
Any agent
npx skills add SecondLifes/code-intel --skill scaling-query-volume
Clone the repo
git clone --depth 1 https://github.com/SecondLifes/code-intel

Made for: Claude Code, Codex.

Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 311 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00056 $0.00311
Opus 5 $0.00028 $0.00156
Sonnet 5 $0.00011 $0.00062
Haiku 4.5 $0.00006 $0.00031

Measured yesterday against content hash 992e499c8897, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

qdrant-scaling-query-volume 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 yesterday.

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.

Origin

This is a copy

100% identical to qdrant-scaling-query-volume — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/qdrant-scaling/scaling-query-volume/SKILL.md · 23 lines

What it actually says

Scaling for Query Volume

Problem: When a query has a large limit (e.g. 1000) and there are multiple shards (e.g. 10), naively each shard must return the full 1000 results — totaling 10,000 scored points transferred and merged. This is wasteful since data is randomly distributed across auto-shards.

Core idea

Instead of asking every shard for the full limit, ask each shard for a smaller limit computed via Poisson distribution statistics, then merge. This is safe because auto-sharding guarantees random, independent data distribution.

When it activates

  • More than 1 shard
  • Auto-sharding is in use (all queried shards share the same shard key)
  • The request's limit + offset >= SHARD_QUERY_SUBSAMPLING_LIMIT (128)
  • The query is not exact

Key tradeoff

The strategy trades a small probability of slightly incomplete results for a large reduction in inter-shard data transfer, especially for high-limit queries across many shards. The 1.2x safety factor and the 99.9% Poisson threshold keep the error rate very low — comparable to inaccuracies already introduced by approximate vector indices like HNSW.

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. yesterday First seen · 23 lines · 56 tokens per session scan A 992e499c8897

Subscribe to this mod's changes

qdrant-scaling-query-volume is a skill published in the GitHub repository SecondLifes/code-intel (2 stars, last pushed 21d ago), licensed Apache-2.0. It adds 56 tokens to every session and 311 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to qdrant-scaling-query-volume, differing in 0 lines, and is treated as a copy.

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