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Topic

Fleet memory efficiency at scale

Treating per-entry bytes as a capacity-planning lever, where hundreds of billions of live entries turn single-byte overheads into hundreds of gigabytes and layout changes free server-scale RAM.

Current clusters

build1 distinct publisher

Shrinking DNS cache entries by half made Cloudflare's inserts 43% faster

Big Pineapple holds more than 250 billion cache entries, so one wasted byte per entry is 250GB of fleet RAM. Cloudflare's fix was mostly a choice of Rust container types, and fewer allocations made the cache quicker rather than slower.

Publishers:blog.cloudflare.com

Reality

Evidence70
Adoption62
Hype gap+12
Incentives68

Confidence66

Fleet memory efficiency at scale — Clarity Today