Re: SableVM on OpenWRT

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Hi Stefan,

You should read the SableVM manual to control the various memory
defaults of SableVM.  e.g.

$ sablevm --property="sablevm.heap.size.min=1024" \
  --property="sablevm.heap.size.increment=1024" \
  MyApp

or

$ java-sablevm -Dsablevm.heap.size.min=1024 \
   -Dsablevm.heap.size.increment=1024 \
   MyApp


Usually, you should let the *.size.max unset (or set to 0), so that
SableVM will grow memory usage as needed by the application.  Setting a
lower max value will only cause useless out of memory errors.

$ man sablevm
...

MEMORY USAGE CONTROL PROPERTIES
       There exist a number of properties that can be used to tune
memory usage of SableVM. Normally it is NOT needed to use any of them,
as SableVM will take care of allocating as much memory, as your
application needs and of freeing the  mem-
       ory when it is not needed anymore. Still, there are some
situations when you want to tune or limit maximum memory usage.

       The general pattern of available memory controlling properties is:

       sablevm.[stack,classloader.heap].size.[min,max,increment]

       which tranlates into the following set of available properties:

       sablevm.stack.size.min

       sablevm.stack.size.max

       sablevm.stack.size.increment

       sablevm.heap.size.min

       sablevm.heap.size.max

       sablevm.heap.size.increment

       sablevm.classloader.size.min

       sablevm.classloader.size.max

       sablevm.classloader.size.increment

              These properties allow for control over java stack, java
heap, and java class loader.

              Meaning of the min, max, increment suffixes is the following:

              ...min initial size in bytes,

              ...max maximal size in bytes (hard limit); 0 means "no limit",

              ...increment step by which the amount of memory is
incremented when needed, up to the limit specified in max, if any; 0
means "fixed size" (no changes allowed, min is used).


Etienne

Stefan Arentz wrote:
> I'm trying to find out how well a free and open java virtual machine can
> run on something smallish like a Linksys WRT54G running OpenWRT (Linux 2.4).
> 
> My biggest concern is memory usage.
> ...

-- 
Etienne M. Gagnon, Ph.D.            http://www.info2.uqam.ca/~egagnon/
SableVM:                                       http://www.sablevm.org/
SableCC:                                       http://www.sablecc.org/

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