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  1.  Home
  2. RPG400-L
  3. January 2014

Re: Java Exception in JDBCR4

On 1/22/2014 11:49 AM, D*B wrote:
The rest of the programming world isn't so lucky. Java grabs memory
from the system and doesn't give it back until we tell Java that we're
done with it. It's pretty easy for a Java newbie (raises hand) to
exhaust memory. So the first half of Scott's advice is very important
to bear in mind.

... simply not true! It's not Java, it's JNI and the lousy implementation of the RPG support of JNI.
Don't use "embedded Java in RPG", it's sucking not only memory, it sucks CPU too.

Respectfully, I have the same problem with a Java-only implementation of
POI/HSSF on my PC. When I work with very large spreadsheets, I run out
of memory. One might argue that I haven't set my JVM up properly, and
one would be correct. But this is not something I worried about in RPG
since I left the overlay linkage editor behind on System/3.

http://apache-poi.1045710.n5.nabble.com/HSSF-and-XSSF-memory-usage-some-numbers-td4312784.html

--buck

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