Name: krT82822 Date: 01/30/2000


(see also 4298569, 4308380)

java version "1.3.0rc1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0rc1-T)
Java HotSpot(TM) Client VM (build 1.3.0rc1-S, mixed mode)

Server programs or CAD/DTP allications need a lot of heap memory, so this
feature request about heap memory size is vital for these programs.

Win32 native programs can use the heap up to almost 2GB.
IBM's JVM can use the heap almost up to 2GB.
If we run Java applications on IBM's JVM, we can get Java programs with the same
hea [avail]ability provided to native programs.

But on the other hand, Sun's JVM can use less than 1.3GB .

IBM has improved the heap management int their JVM.

Look at the article "Heap of trouble" with the wrong heap size"
                              
http://www-4.ibm.com/software/developer/library/tip-heap-size.html
"Better heap growth support in IBM Developer Kit Java Technology Edition"

For Java server applications, we recommend that you check the heap size if you
find that performance is not optimal. IBM has implemented a remedy for this
pervasive Java problem by growing the heap more intelligently.

This technology was first shipped in IBM Developer Kit for Windows, Java
Technology Edition, Version 1.1.7 and was enhanced in IBM Developer
Kit for Windows and OS/2 Warp, Java Technology Edition, Version 1.1.8.

With these JVMs, the user rarely has to set the heap sizes; the initial default
paired with intelligent growth are usually sufficient.
(Review ID: 100516)
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