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Cloudflare freed up 100TB of RAM behind its 1.1.1.1 DNS without adding a single server

Cloudflare’s DNS tweak unlocks 100 TB of RAM, reshaping how internet queries are cached

By · Published August 30, 2026 at 04:29 UTC · Updated August 30, 2026 at 05:24 UTC

5sources
5articles
3velocity
+0%since first seen
1h agofirst detected

Evidence dossier

Intelligence passport

55/100 Publishable
5distinct sources shown
2velocity measurements
1language editions checked
All brief claims passed the second-source checkbrief evidence status

Measured timeline

  1. Detected The first matching coverage entered the Archynetys cluster.
  2. Latest coverage observed Most recent article currently attached to this story cluster.
  3. Peak measured velocity The recorded velocity reached 3.
  4. Evidence threshold reached The story had enough independent coverage for an explanatory brief.

Source diversity sample: igor´sLAB · XenoSpectrum · Yahoo Tech · Cloudflare Blog · TechSpot.

How this dossier is built: methodology · AI policy · corrections.

The obvious questions

What specific change allowed Cloudflare to free the memory?

The company re‑engineered the DNS cache for 1.1.1.1, shrinking each cache entry to reduce overall RAM usage, as described in its own blog post.

How much memory was recovered by the optimization?

A total of 100 terabytes of RAM was freed, according to the reporting.

Did the memory savings require new servers or hardware upgrades?

No new servers were added; the savings were achieved purely through software‑level cache adjustments.

The story so far

Cloudflare announced that it freed 100 terabytes of RAM by reshaping the cache architecture behind its 1.1.1.1 public DNS service. The change required no new hardware; the savings came solely from trimming cache entries.

The DNS service typically holds around 250 billion cached entries at any moment, and the company noted that each unnecessary byte would consume roughly 250 GB of memory. By reducing the size of each entry, the optimization removed a massive amount of idle RAM across the fleet, a detail highlighted in the Cloudflare Blog and echoed by TechSpot.

End‑users of the 1.1.1.1 resolver stand to benefit from a leaner cache and potentially faster query handling, while the reclaimed memory can be redeployed for other workloads within Cloudflare’s network. The provider indicated that similar cache‑efficiency techniques may be explored for additional services, with performance data to follow.

Synthesized by Archynetys from the headlines below under a strict no-invention contract. ✓ fact-checked: all claims supported by sources Updated 1h ago.

Coverage (5)

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Topics

Cloudflare 1.1.1.1 DNS cache RAM optimization tech

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