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From "Geir Magnusson Jr." <g...@pobox.com>
Subject Re: [general] memory usage and default Xmx
Date Tue, 06 Feb 2007 15:25:25 GMT

On Feb 6, 2007, at 9:29 AM, Kalpak Gadre wrote:

> Hi,
>
> When I tried running eclipse with harmony, I found out that the  
> default Xmx value is set to 256M
> Is there any specific reason why this is set so high? Because it  
> may lead to impression of hdk
> being a memory hogger. I have 512M RAM and my eclipse started  
> taking up 256M memory from
> start. Which made me feel hdk was a memory hogger.

:)

>
> 1. Can we not set it by default to some lower value (like sun sets  
> it to 64M), and when you need
> it to be high, you can always override the default Xmx.

Sure.  Can you enter a JIRA?

>
> 2. I also experienced that whatever Xmx I set, eclipse would start  
> with heap size of Xmx. (utilising
> the maximum alloted heap size)
>

That's a question someone else will have to answer.


> 3.  I specified -Xmx as 128M and the heap size showed 128M but  
> process memory usage exceeded 280M.

That doesn't surprise me, as -Xmx is for the java heap, and there are  
other native resources consumed by the VM and class library beyond  
just the java heap

geir

>
> Thanks,
>
> Kalpak


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