qdrant-minimize-latency

A guide for reducing query latency in Qdrant, the time a vector search takes to return an answer.

In plain words
What is it for?
Tuning segment counts, vector memory, HNSW search effort, quantization, storage, RAM, and payload indexes when search or tail latency is high.
Why use it?
It identifies settings and hardware choices that can make searches slow, especially when data no longer fits comfortably in memory.

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/minimize-latency
Any agent
npx skills add SecondLifes/code-intel --skill minimize-latency
Clone the repo
git clone --depth 1 https://github.com/SecondLifes/code-intel

Made for: Claude Code, Codex.

Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 621 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 $0.00063 $0.00621
Opus 5 $0.00032 $0.00311
Sonnet 5 $0.00013 $0.00124
Haiku 4.5 $0.00006 $0.00062

Measured yesterday against content hash 6a5d30b48f68, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

qdrant-minimize-latency 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-minimize-latency — 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/minimize-latency/SKILL.md · 42 lines

How it starts

The opening of the file, as written. The whole thing — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Scaling for Query Latency

Latency of a single query is determined by the slowest component in the query execution path. It is sometimes correlated with throughput, but not always — throughput and latency are opposite tuning directions.

Low latency optimization is aimed at utilising maximum resource saturation for a single query, while throughput optimization is aimed at minimizing per-query resource usage to allow more parallel queries.

Performance Tuning for Lower Latency

  • Increase segment count to match CPU cores (default_segment_number: 16) Minimizing latency
  • Keep quantized vectors and HNSW in RAM: memory: pinned on Qdrant 1.19 or newer, always_ram: true on 1.18 or older
  • Reduce hnsw_ef at query time (trade recall for speed) Search params
  • Use local NVMe, avoid network-attached storage

Memory Pressure and Latency

RAM is the most critical resource for latency. If working set exceeds available RAM, OS cache eviction causes severe, sustained latency degradation.

  • Vertical scale RAM first. Critical if working set >80%.
  • Use quantization: scalar (4x reduction) or binary (16x reduction) Quantization
  • Move payload indexes to disk if filtering is infrequent: memory: cold on Qdrant 1.19 or newer, on_disk: true on 1.18 or older On-disk payload index
  • Set optimizer_cpu_budget to limit background optimization CPUs
  • Schedule indexing: set high indexing_threshold during peak hours

Vertical Scaling for Latency

More RAM and faster CPU directly reduce latency. See Vertical Scaling for node sizing guidelines.

What NOT to Do

Read the full file on GitHub · 42 lines

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 · 42 lines · 63 tokens per session scan A 6a5d30b48f68

Subscribe to this mod's changes

qdrant-minimize-latency is a skill published in the GitHub repository SecondLifes/code-intel (2 stars, last pushed 21d ago), licensed Apache-2.0. It adds 63 tokens to every session and 621 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-minimize-latency, differing in 0 lines, and is treated as a copy.

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