Surviving spiky, bursty traffic

Surviving spiky, bursty trafficscale-up latency is the enemy

The hard truth of bursty load is that adding a node isn't instant. A new EC2 instance must boot, join the cluster, pull images and pass readiness, which can take minutes - and a traffic spike doesn't wait. So you buy time with headroom and warm capacity rather than reacting from zero.

• Keep a headroom buffer (over-provisioning / pause pods) so a spike lands on already-running capacity while new nodes boot.
• Use warm pools or fast-launching node types so scale-up latency is seconds, not minutes.
• Pre-pull large images to nodes so image fetch isn't on the critical pathThe longest end-to-end chain of dependent work in a plan; it sets the realistic timeline no matter how parallel everything else looks. A slip on the critical path moves the date; a slip on a task with slack does not. Press Enter for the full definition. during a spike.
• Set HPA min replicas above your true floor for spiky services, so you never scale up from a cold, single-pod state.