Engineering blog
Notes from running boring infrastructure.
No press releases. No roadmaps. Just things we learned operating the platform.
Postgres
Operations
What we learned chasing replication lag in Postgres 16
Replication lag is rarely about disk. It’s almost always about WAL contention, async commit, and the one query you forgot existed. Here’s our checklist.
Apr 15, 2026 · 7 min read
Deploys
Postgres
Blue-green schema migrations without breaking production
How we run online schema changes for our customers’ multi-terabyte Postgres clusters. Spoiler: pg_repack + a careful read of pg_locks.
Mar 22, 2026 · 9 min read