1. A system for data management in a computing storage environment, comprising: a processor device, operable in the computing storage environment and executing instructions stored in a memory, wherein the processor device: destages modified data over a certain time period during a quiesce/resume operation of any particular logically contiguous storage space to an amount of Non Volatile Storage (NVS) space upon performing a code load operation by establishing a threshold for the amount of NVS space to be consumed by the any particular logically contiguous storage space in the computing storage environment based on a percentage amount of a number of a plurality of storage devices, a Redundant Array of Independent Disks (RAID) type, a number of point-in-time copy source data segments in the logically contiguous storage space, and a storage classification; wherein establishing the threshold for the amount of NVS to be consumed based on the number of point-in-time copy source data segments in the logically contiguous storage space further includes considering resources needed to perform a Copy Source To Target (CST) operation required prior to the point-in-time copy source data segments being destaged.