# System Parameters

'SK' | Shrink Keyed Files

## Description

Shrinks Keyed files when executing the PURGE or REFILE directives. PxPlus returns the freed space to the operating system.

## Default

Off

By default, PxPlus simply re-initializes the file header information when it encounters a PURGE or REFILE directive for a data file (Keyed or Direct). This means that if you accidentally PURGE/REFILE such a data file, the PxPlus Keyed/Direct file key reconstruction utility (*UFAR) can salvage most, if not all, of the information originally stored in the file.

## See Also

PURGE Clear Data from a File
REFILE Clear Record from File