Hi , I have Java 1.4 and Java 6.0 installed on my Z/os 1.10. I did a simple test to check if there is performance differences between this version :
performing 'java -version' on J6 takes 7-8 seconds: java version "1.6.0" Java(TM) SE Runtime Environment (build pmz3160sr8fp1ifix-20100924_01(SR8 FP1+IZ8 1201+IZ80998+IZ83034+IZ83273)) IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 z/OS s390-31 jvmmz3160sr8ifx-20100923 _65174 (JIT enabled, AOT enabled) J9VM - 20100923_065174 JIT - r9_20100401_15339ifx6 GC - 20100308_AA) JCL - 20100728_01 performing 'java -version' on J1.4 takes 2-3 seconds: java version "1.4.2" Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2) Classic VM (build 1.4.2, J2RE 1.4.2 IBM z/OS Persistent Reusable VM build cm142- 20080517 (SR11) (JIT enabled: jitc)) I know it not the best test but I do think it point on something , or am I wrong? I looked in tuning Tips document for Java6 and couldn't found something that will affect this differences (most of the tuning to be done are in the system level and not on the Java level) Am i missing something? I read in IBM site that the performances should be improve with any version not decrease . -- best regards, matan cohen MF System Administrator. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
