The logical record length
for reading or writing external files is first determined by the LRECL=
option in the access method statement, function, or command that is
used to read or write an individual file, or the DDName value in the
z/OS operating environment. If the logical record length is not specified
by any of these means, SAS uses the value that is specified by the
LRECL= system option.
Use a value for the
LRECL= system option that is not an arbitrary large value. Large values
for this option can result in excessive use of memory, which can degrade
performance.
z/OS Specifics: Under
z/OS, the LRECL= system option is recognized only for reading and
writing HFS files.