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Hello All,
I had to write a program to write DB data to a stream file in comma
delimited format. No problem, done it many of times. Then I ran into a
problem, running the program seemed to take hours. Well, I determined that
was a bad subprocedure on my part, so I fixed that and it now takes only
about 5 minutes to run.
While doing this doing this I tried a couple of other approaches. I wrote
the data to a table and used CPYFRMIMPF to export it to a CSV, this took
about 1 minute 40. I also wrote a simple Java program to execute an SQL
statement and write the results to a stream file, this took about 1 minute
10. ** Note, there was no scientific approach to the time calculation, just
simple start and end times.
It seems that the invocation of subprocedures in a service program
significantly slows down performance. I invoke 2 subprocedures on each write
to the stream file, a replace all subprocedure and the write line
subprocedure. So, for the question, what kind of overhead is there when
invoking subprocedures from a service program? I'm sure there is information
on this, I just can't seem to find it.
Thanks in advance,
--
James R. Perkins
http://twitter.com/the_jamezp
midrange.com
