Prediction: 2026 is going to be the year Memory Tiering eats the world.
The pieces are already there:
- Memory Shortage (duh)
- CXL 3.1 realistically purchasable (memory pooling)
- Linux Transparent Page Placement becomes opt-out instead of opt-in
- Kubernetes DRA (dynamic resource allocation) graduated to stable
- systemd-oomd kill threshold getting smarter
All of these are building on each other to allow extreme over-provisioning of ram on hyperscalers.
You might think your cloud instance has 128gb of RAM…it could be only 32GB of real DRAM. It’s just really, really clever.