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Cloudflare reclaims 100TB RAM by shrinking DNS cache entries

By PulseAugur Editorial · [1 sources] ·

Cloudflare has significantly reduced its RAM usage by optimizing its DNS cache entries for its 1.1.1.1 service. Through five key changes implemented in Rust, the company decreased the memory footprint of each cached DNS entry from 953 bytes to 420 bytes. This optimization has freed up approximately 100TB of RAM across its global infrastructure, which is equivalent to the DDR5 memory in 130 of its Gen 13 servers. The reclaimed memory will be reinvested into expanding DNS caches to improve hit rates and reduce upstream query traffic. AI

IMPACT Minor efficiency gains in DNS resolution infrastructure; no direct impact on AI model performance or development.

RANK_REASON This is a technical optimization for an existing product, not a new release or significant industry shift.

Read on Tom's Hardware →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Cloudflare reclaims 100TB RAM by shrinking DNS cache entries

How we ranked this

Signal score
2 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
This is a technical optimization for an existing product, not a new release or significant industry shift.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
infra, product
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
Low
Off-topic or adjacent — cluster remains reachable but doesn't surface in AI-industry rankings.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. Tom's Hardware TIER_1 English(EN) · Luke James ·

    Cloudflare frees up 100TB of RAM by shrinking 1.1.1.1's DNS cache entries — 250 billion cached DNS entries at any given time means one wasted byte costs 250GB

    Cloudflare says that it has freed up roughly 100TB of RAM across its global fleet without reconfiguring any physical RAM modules in its servers.

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