RE: Java on 7.1 one system fast other system very slow

Kevin,

I'll have to check this (I'll try anything at this point)

John


-----Original Message-----
From: Kevin Bucknum [mailto:Kevin@xxxxxxxxxxxxxxxxxxx]
Sent: Monday, August 17, 2015 10:17 PM
To: MIDRANGE-L@xxxxxxxxxxxx
Subject: RE: Java on 7.1 one system fast other system very slow

Off in left field, and probably a red herring, but what are the
differences in DNS settings?




Kevin Bucknum
Senior Programmer Analyst
MEDDATA/MEDTRON
Tel: 985-893-2550

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
John Allen
Sent: Monday, August 17, 2015 4:02 PM
To: MIDRANGE-L@xxxxxxxxxxxx
Subject: Java on 7.1 one system fast other system very slow

We have a CL program that calls a java program to read modify and
write a file in the IFS



Both machines let's call them F and S (Fast and Slow)



They are configured the same (except slight difference in memory and
disk storage see below)

Both running IBM I 7.1

Both at the same PTF levels for both the SS1 and JV1

Both have similar memory

Both have similar System ASP used (10 % vs 23%)

Both have Java Version =

java version "1.6.0"


Java(TM) SE Runtime Environment (build pap3260sr16fp1-20140706_01(SR16
FP1))

IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 OS/400 ppc-32
jvmap3260sr16fp1-20140706_01 (JIT enabled, AOT enabled)

J9VM - 20140626_204542


JIT - r9_20130920_46510ifx7


GC - GA24_Java6_SR16_20140626_1848_B204542)


JCL - 20140704_01





Note:

Executing JAVA *VERSION

System F response is instant

System S Response is 20 seconds



We are seeing something similar with our CL program

System F= 5-10 seconds

System S=60-80 seconds



The "JAVA *VERSION" execution is so different I don't think it is
anything in our CL or java program.



I keep comparing the 2 and can't find a difference other than the
performance of Java being so vastly different



What could cause a variance of the simple execution of "JAVA *VERSION"



Any idea or suggestions on where to I can look?



Thanks in advance for any assistance



John













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