Idle sandboxes pause themselves

A new sandbox pauses after 60 seconds with nothing happening in it, used or not (a persistent one only if you set an idle time), and pays only paused storage until the next request wakes it. A command or terminal still running, an open preview, port, SSH or tunnel connection, network traffic or CPU use keeps it awake. idlePauseSeconds now goes as low as 10 seconds, and 0 still turns it off. Sandboxes made before today keep their settings. See pause when idle.