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This file measures swap space and its utilization. For a system with only one swap partition, the output of
/proc/swapmay look similar to the following:
Filename Type Size Used Priority /dev/mapper/VolGroup00-LogVol01 partition 524280 0 -1
While some of this information can be found in other files in the
/proc/swapprovides a snapshot of every swap file name, the type of swap space, the total size, and the amount of space in use (in kilobytes). The priority column is useful when multiple swap files are in use. The lower the priority, the more likely the swap file is to be used.