Frame choosing during storage constraint condition

A computing system configured to execute a frame choosing method during a storage constraint condition, the computing system comprising:

• a processor, central storage and auxiliary storage, the processor being configured to:
• calculate a use-grouped-threshold,
• compare a number of available grouped frames that are each provided as a quad frame comprising multiple contiguous 4k frames to the calculated use-grouped-threshold,
• return a decision to use a grouped frame in an event that the number of the available grouped frames exceeds the calculated use-grouped-threshold,
• return a decision to use an above-the-bar frame in an event that the number of the available grouped frames is less than or equal to the calculated use-grouped-threshold,
• calculate a sum of a number of reserved grouped frames and a number of available above-the-bar frames, wherein the number of reserved grouped frames is an increasable and decreasable percentage of a number of grouped frames in use,
• count a number of grouped and above-the-bar frames in use,
• determine whether the number of the grouped and above-the-bar frames in use exceeds a threshold percentage of available frames, and
• take an action in accordance with the determining.