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pier pier

Resize

The supervisor reports sustained cpu and memory pressure (kernel PSI), and pier resize fixes it without losing anything:

$ pier ls
NAME           REPO  STATE               AGE  COST
checkout-flow  shop  working (strained)  2h   ~$0.04/h


$ pier resize checkout-flow t4g.xlarge

Or press m in the TUI. It lists same-arch machines with their vCPU, memory and hourly cost, so nobody memorizes instance type names.

One park/resume cycle of about 40 seconds, disk and state intact.

Deliberately not automatic

Section titled “Deliberately not automatic”

The VM holds no cloud credentials, so it cannot resize itself. Auto-scaling is also a surprise-cost footgun. You see strain, you decide.

Limits

Section titled “Limits”

Resize stays within the CPU arch (t4g to t4g). Providers only allow type changes on stopped instances, which is where the park/resume cycle comes from. It needs one extra AWS permission, ec2:ModifyInstanceAttribute.