Increases the size of a database file. By default, GT.M automatically extends a database file when there is available space.
The format of the MUPIP EXTEND command is:
EXTE[ND] [-BLOCKS=<data-blocks-to-add>] region-name
The only qualifier for MUPIP EXTEND is BLOCKS.
The required region-name parameter specifies the name of the region to expand.
EXTEND uses the Global Directory to map the region to the dynamic segment and the segment to the file.