user space

hi rpg400 list,

i'm quite new and inexperienced to rpg (especially rpg iv) so sorry for
the newbie questions.

my first question: is this list only for rpg400 or also for rpg iv
(previously named ile rpg) ?

i got the following situation:
my programm accesses to tables. one table is read from top to bottom,
every record, and has about 15000 records. the second table is accessed
about every 10th record and has only 30 records.

now my second question: would it be better to read the necessary data
from the second table into a userspace object? if so, how do i store and
access it from the userspace object. or are there any other way to have
less database access/workload. it seems to me that it would be faster to
first store the data in some temporary memory. though i could be wrong,
cause that would be the way i would do it on a PC and i know that it's a
big difference.

i'm thankfull for every suggestion.

thanx in advance.

mk