RE: iSeries JVM version

["Urbanek, Marty" <Marty_Urbanek@xxxxxxxxxxxx>]

Joe,

Please clarify: are you saying there is a multi-fold (8X) increase in 
performance between the iSeries 1.4.1 and 1.4.2 JVM running on the same machine?

Have you compared the total MHz available on the 840-2420 24-way versus the 595 
16-way? Could this be more a matter of increased CPU cycles to run the JVM 
rather than JVM code? I recall someone on midrange-l stating that their 4-way 
i5 whipped their 12-way 8xx. 24x600=14400. 16x1650=26400 (do we still need to 
multiply by 2 for the Super-Hyper-Multi-Threaded POWER5? - even so it would not 
account for 11X improvement)

Poll answer: we run JDK 1.3.1 and 1.4.2 on V5R2 and V5R3. The V5R2 box is 
SF99169 level 19 and received JDK 1.4.2 as part of a PTF group some time ago, 
although like Pete, I don't remember exactly which level. Our V5R3 box is at 
SF99269 level 4. I think V5R3 JDK 1.4 was always 1.4.2 (from base OS/400 
install).

FYI - the PTF group level numbers are just sequential numbers meaningful only 
relative to each other, so 2 is newer than 1, 3 is newer than 2, etc. A certain 
PTF group number is associated with a PTF group for a particular OS/400 VRM, in 
this case, Java, SF99169 is for V5R2 and SF99269 is for V5R3. They are 
cumulative, like an OS/400 cume but encompassing only a certain subset of 
functionality, such as Java.

-Marty