I am trying to install IBM Installation Manager(agent.installer.linux.gtk.x86_64_1.9.0.20190715_0328.zip) on Rhel 7.4 which is installed newly. I test the java because GUI is so slow and here are the result; as you can see oracle java dramaticly faster than IBM java!! why does this happen?
[root@adige bin]# uname -a
Linux adige 3.10.0-693.el7.x86_64 #1 SMP Thu Jul 6 19:56:57 EDT 2017 x86_64 x86_64 x86_64 GNU/Linux
[root@adige bin]# time /installations/unpacked/installationManagerX86_64_1.9/jre_8.0.5035.20190626_1229/jre/bin -version
java version "1.8.0_211"
Java(TM) SE Runtime Environment (build 8.0.5.35 - pxa6480sr5fp35-20190418_01(SR5 FP35))
IBM J9 VM (build 2.9, JRE 1.8.0 Linux amd64-64-Bit Compressed References 20190417_414854 (JIT enabled, AOT enabled)
OpenJ9 - 777635f
OMR - 16b77d7
IBM - 72459d3)
JCL - 20190409_01 based on Oracle jdk8u211-b25
real 0m20.185s <<<<<< Lasting 20 seconds.
user 0m0.169s
sys 0m0.034s
[root@adige bin]# time /tmp/java-8-oracle/jre/bin/java -version
java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
real 0m0.098s
user 0m0.079s
sys 0m0.031s
The problem caused by hostname is not in DNS records and /etc/hosts does not contain hostname. You can find the solution at this site. I did not link because ibm sunsetting community sites through developerworks. https://www.ibm.com/developerworks/community/forums/html/topic?id=7becc2aa-6897-4d16-b696-dca2c9e767bf