This configuration variable sets the maximum size of a Vision 4 file segment
in bytes. The default value is 2,147,482,112 (i.e., 2GB - 1536), except on
older HP/UX machines where it is 1,073,740,288 (i.e., 1GB - 1536) due to an operating system limitation. You may not use larger values,
but you can set smaller ones. The default value is the maximum allowed. The
value specified will automatically be rounded down to a multiple of the block
size of the file being created. For example, if the default V_SEG_SIZE value is
used and a file with a block size of 1024 is created, the segment size for that
file will be 2,147,481,600 (i.e., 2GB - 2048).
Using a smaller value for the segment size can help if you do not have 2GB
free on any disk or for testing purposes. The minimum value allowed is 81,920
bytes. To minimize the number of files created, you should set this value as high
as possible.
The segment size of a file is set at file creation time and cannot be modified
without recreating the file (i.e., using vutil -rebuild with a different V_SEG_SIZE setting). vutil uses this variable, but since it does not use a configuration file, this
variable must be set in the environment.