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1. Re: ARS 19.02 + Java 11: Recommended java GC options
Marek CeizelMar 6, 2019 8:08 AM (in response to Andreas Mitterdorfer)
Thanks Andreas for informing us. These are important informations for our future upgrades.
Matt Laurenceau Matt, I don't know whom to ping and we cannot comment the Knowledge base article (it is an old one). Can we get new recommendations for Java 11 similar like here KnowledgeArticle - BMC ?
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2. Re: ARS 19.02 + Java 11: Recommended java GC options
Mark WaltersMar 6, 2019 8:19 AM (in response to Andreas Mitterdorfer)
9 of 9 people found this helpfulYes, the KAs need to be reviewed and updated to include 1902, but the requirement to remove that Java option is noted in the docs on this page. Easy to miss as you made the change after installing.
Preparing to run the installers - Documentation for Remedy Deployment 19.02 - BMC Documentation
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3. Re: ARS 19.02 + Java 11: Recommended java GC options
Ashutosh DeshpandeMar 6, 2019 8:31 AM (in response to Andreas Mitterdorfer)
5 of 5 people found this helpfulWe have documented it here: Updating Java paths after upgrading Java - Documentation for Remedy Deployment 19.02 - BMC Documentation
Please follow and let us know in case you run into any issues.
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4. Re: ARS 19.02 + Java 11: Recommended java GC options
Andreas Mitterdorfer Mar 6, 2019 9:53 AM (in response to Ashutosh Deshpande)Thank you both Mark Walters and Ashutosh Deshpande missed that part completly.
One question though: I assume I don't need to implement -XX:+UseG1GC as its the default?
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5. Re: ARS 19.02 + Java 11: Recommended java GC options
Ashutosh DeshpandeMar 6, 2019 11:18 PM (in response to Andreas Mitterdorfer)
1 of 1 people found this helpfulAndreas Mitterdorfer, mostly correct . G1 garbage collector is the default in most common hardware and operating systems, so normally it won't be required. If you add it explicitly, it will always be the GC used. Refer to this oracle doc: Available Collectors
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6. Re: ARS 19.02 + Java 11: Recommended java GC options
Andreas Mitterdorfer Sep 4, 2019 8:33 AM (in response to Ashutosh Deshpande)Ashutosh Deshpande and Mark Walters
Following up on these recommendations, as I stumbled upon Garbage First Garbage Collector Tuning and Garbage-First Garbage Collector Tuning mentioning to avoid -XX:NewRatio setting (among others) when using -XX:+UseG1GC.
I just installed 19.08 ARS and found the setting present in arserver.config so I was wondering wheter I should remove it or not.
Please can you advise?
Maybe -XX:NewRatio was meant for use alongside-XX:+UseConcMarkSweepGC and/or -XX:-UseParNewGC?
Or maybe it doesn't have that much impact so that I can ignore it?
Thanks in advance!
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7. Re: ARS 19.02 + Java 11: Recommended java GC options
Michael Gould Nov 6, 2019 11:38 AM (in response to Andreas Mitterdorfer)1 of 1 people found this helpfulHas BMC (or anyone else out there) done any performance testing between Java 8 vs. Java 11 vs Java 12 (now supported with 19.08)? Using the same hardware/software stack and just changing out the version of Java used?