[jboss-jira] [JBoss JIRA] (WFLY-6046) Suggested defaults for Metasize and Java 8

[Ken Wills (JIRA)]

     [ https://issues.jboss.org/browse/WFLY-6046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ken Wills updated WFLY-6046:
----------------------------
    Description: 
Since PermGen is no longer used, and has been replaced by Metasize, we probably need to alter the initial startup values. Current WF is using:

-XX:MaxMetaspaceSize=256m

After some testing with garbage collection logging on (-verbose:gc -Xloggc:hcgc.log -XX:+PrintGCDateStamps -XX:MetaspaceSize=XX), the GC logs were monitored for at least one occurrence of a full GC due to Metadata threshold (example [Full GC (Metadata GC Threshold)  39592K->20187K). Using this information, minimum levels of Metasize for various configurations were determined.




> Suggested defaults for Metasize and Java 8
> ------------------------------------------
>
>                 Key: WFLY-6046
>                 URL: https://issues.jboss.org/browse/WFLY-6046
>             Project: WildFly
>          Issue Type: Enhancement
>            Reporter: Ken Wills
>            Assignee: Ken Wills
>
> Since PermGen is no longer used, and has been replaced by Metasize, we probably need to alter the initial startup values. Current WF is using:
> -XX:MaxMetaspaceSize=256m
> After some testing with garbage collection logging on (-verbose:gc -Xloggc:hcgc.log -XX:+PrintGCDateStamps -XX:MetaspaceSize=XX), the GC logs were monitored for at least one occurrence of a full GC due to Metadata threshold (example [Full GC (Metadata GC Threshold)  39592K->20187K). Using this information, minimum levels of Metasize for various configurations were determined.



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