Cloudflare saves 100 TB of RAM again, this time by slashing server hashes by 90% — cutting 100,000 entries down to 10,000 eliminates massive cache bloat
- ID
- 26779
- Status
- summarized
- Published
- 21 Sep 2026, 7:30 PM
- Fetched
- 21 Sep 2026, 8:53 PM
- Provider
- Tom's Hardware
- Category
- technology
- Original URL
- https://www.tomshardware.com/software/cloudflare-saves-100-tb-of-ram-again-this-time-by-slashing-server-hashes-by-90-percent-cutting-100-000-entries-down-to-10-000-eliminates-massive-cache-bloat
- Source URL
- https://www.tomshardware.com/feeds/all
Summary
- Score
- 6.5
- Created
- 21 Sep 2026, 8:54 PM
- Tags
- Audience
- developersdatabase_learners
What happened
Cloudflare reduced server hash entries from 100,000 to 10,000, a 90% cut, which eliminated massive cache bloat and saved 100 TB of RAM across their infrastructure. This is their second such large-scale RAM optimization, following a previous 100 TB saving.
Why it matters
If you run large-scale caching or distributed systems, this is a concrete reminder that cache key cardinality directly drives memory cost. Audit your own cache key designs—consolidating or bucketing high-cardinality keys can yield outsized RAM savings without buying more hardware.
Discussion angle
What cache key or hash designs in your own systems have unnecessary cardinality, and what would a 90% reduction cost in terms of collision rate or accuracy?