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The latest from the engine room.

EngineeringSeptember 24, 2026 · 8 min read

How we cut p99 from 11 ms to 4.2 ms

Three changes to the read path in v4.0: declared sort keys, a per-core allocator and a planner that stopped re-sorting partitions at query time.

By Sigrún Halldórsdóttir · Staff engineer, Query engine

Every post, newest first.

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EngineeringSeptember 18, 2026 · 9 min read

Exactly-once without two-phase commit

Idempotent sinks, epoch fencing and a 64-bit sequence per partition. No coordinator, no stalls.

EngineeringSeptember 4, 2026 · 7 min read

Time travel is just a really good index

Why AS OF queries on 30 days of history cost less than one extra replica.

CustomersAugust 27, 2026 · 5 min read

Orbitly deleted 14 pipelines in a quarter

How a fintech team replaced nightly batch jobs with six materialized views.

ProductAugust 12, 2026 · 6 min read

Designing schema evolution nobody notices

Additive changes ship instantly. Breaking ones backfill in the background while v1 keeps serving.

EngineeringJuly 30, 2026 · 11 min read

What 38 regions taught us about clocks

Hybrid logical clocks, a 3 ms skew budget and the night Singapore drifted.

ProductJuly 16, 2026 · 4 min read

Lineage you can actually read

The new graph view collapses 200-node pipelines into the five hops that matter.

CustomersJune 25, 2026 · 6 min read

Quarry tracks 9,000 trucks on one view

GPS pings, CDC from the dispatch database and a single join, served under 5 ms.

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