DesignStore.prune

DesignStore.prune()

Remove designs, least recently used first; return their identifiers.

A design is used when it is committed or found again. Designs unused for longer than max_age seconds are removed, then the least recently used until the store holds at most max_bytes. A design used within the last day is kept whatever the limits, since a series may still be playing or reconstructing it. Stages older than an hour, left by a process that ended mid-design, are removed as well.