Re: [Wrapper-user] Automatic adaption of detailed JVM parameters like -Xmn to system memory

[Maxime <ma...@ta...>]

Holger,

Thank you for your message.

We discussed about the issue you raised and we plan to solve it by
introducing a new virtual variable in the next release of the Java Service
Wrapper.
The variable will be something like WRAPPER_SYSMEM_<P> where <P> is a
percentage of the physical memory available on the system.
You will be able to use it in the wrapper.java.additional parameters for
any JVM options that deal with memory.



*wrapper.java.additional.x=-Xmx%WRAPPER_SYSMEM_60.0%*
Your feedback is highly appreciated. Thank you.

Sincerely,

The Java Service Wrapper team.

On Tue, Feb 23, 2016 at 1:54 AM, Isenberg, Holger <ise...@e-...>
wrote:

> With wrapper.java.maxmemory.percent a fraction of the system memory can be
> automatically assigned to the JVM to be used as overall heap limit. That is
> working fine, but for our server software, more specific JVM parameters are
> required as wrapper.java.additional like -Xmn or -XX:MaxMetaspaceSize or
> -XX:ReservedCodeCacheSize. For now, the values for these parameters are set
> to absolute numbers by our post-install script.
>
> For automatic app deployment, a setting as fraction like maxmemory.percent
> is preferable so the process would automatically resize on the next start
> after the machine memory is increased.
>
> Is someone using a workaround with using wrapper.java.additional_file to
> set environment variables to be read afterwards or something else to
> achieve setting percent values in wrapper.java.additional?
>
> --
> Holger Isenberg
> e-Spirit AG
>
>
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