Tag: websocket

All the articles with the tag "websocket".

• I built Uber's backend. It crashed at 5,000 drivers, and these three fixes held it up

  23 Oct, 2026

  A Go location service on a local kind cluster behind HAProxy, load-tested with k6. One pod gets OOMKilled at about 5,000 WebSocket drivers, three pods lose two thirds of the drivers, Redis pub/sub brings them back and a Horizontal Pod Autoscaler grows it to four pods at 10,000 drivers, with every manifest, command and number.