Re: Runtime.getRuntime().maxMemory() returns incredibly large value

Yes, from API perspective any long value is valid (even Long.MAX_VALUE of course) and should be handled correctly.
I will contact the OrientDB developers to point them to this issue.

I still have the side question if it is possible to somehow provide JVM command line parameters programmatically when using the converted DLLs?
For example, I would like to set the -XX:MaxDirectMemorySize parameter from within my code.

Thanks
Torsten


From: Volker Berlin [mailto:[email protected]]
Sent: Monday, May 30, 2016 4:05 PM
To: [email protected]
Subject: Re: [Ikvm-developers] Runtime.getRuntime().maxMemory() returns incredibly large value


The method returns  java.lang.Long.MAX_VALUE and this is correct for this API method. Take a look at the API docu. It look like a bug in your library.

Volker

Am 30.05.2016 um 15:24 schrieb [email protected]<mailto:[email protected]>:
Hi,
I converted OrientDB (https://github.com/orientechnologies/orientdb) current sources into a .NET dll using ikvmc tool (v 8.1.5717.0).
Unfortunately in the startup code of OrientDB code a check against Runtime.getRuntime().maxMemory() is made which returns a value of 9223372036854775807 for me.
This value is then used by the OrientDB code and fails with a NumberFormatException due to some call of integer.tryParse.

Interestingly running the original OrientDB jar files with java.exe does not exhibit the same exception, which is due to a much lower value returned by the Runtime.getRuntime().maxMemory()
call (something like 477102080).

So is there an explanation for the very large number returned by ikvm runtime? Is it a bug?

There would be a way to work around the exception throwing code in OrientDB if it would be possible to somehow provide JAVA runtime parameters like -XX:MaxDirectMemorySize=.
But this does not seem to be possible or did I miss something?

Thanks
Torsten

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