Re: [GridSim-developers] [GridSim-users] simulation fails(OOME) with 1000 resources

[Agustín C. H. <ag...@ds...>]

Hi Ye,

I've also suffered the problems u describe, and I'm afraid there is no 
solution for them. The only suggestion I can give to u is to scale down 
your simulations.

The problem comes from Java's inability to handle more than 1.5 GB of 
memory, so there is nothing u can do.

Just one thing, are u using Sun Java? Because using another different 
java may cause problems... The java I us is Sun  v1.4.2

Regards,

Agustin

ye escribió:
> Hi, Dear all:
> Although I have asked a similar question in gridsim-user maillist, 
> there seems no similar experience from other developers. Since it's an 
> crucial problem for me, I'd to make the scenario much clear and beg 
> for help.
>
> For brief, is there any scale limit for simulation created via GridSim?
>
> I was trying to set up a gridsim simulation with 1000 resource; each 
> resource contains one machine, each machine has two PEs. Then, I wrote 
> a user to retrieve resource list within its body(), and print the 
> total size. However, the program halts with an OutOfMemoryError, every 
> time before "Entities started" was printed. The user's body() was 
> never visited.
>
> I am working on a mac 10.5, 2GB 667 Mhz memory, mac JVM 1.5; 
> meanwhile, I already adjust the vm parameter into "-Xms512m -Xmx1024m".
>
> Later, I tried the same program on my server (ubuntu 8.04, 3.2GB). 
> Fortunately, it works... but, it halts again with OOME while i decide 
> create 1100 resources.
>
> I am not sure the problem is caused by lacking of memory? Is there any 
> limit for gridsim simulation scale, or just for GridSim Resource? Or 
> it's bug derived from simjava?
>
> Finally, is it possible to solve it?
>
> Thank you guys a lot!!
>
> regards
> ye
>
> -- 
> Ye Huang, Department of Informatics
> University of Fribourg / Pérolles 2 - Bld de Pérolles 90
> 1700 Fribourg, Switzerland
>
> e-mail: ye....@he..., ye....@un...
> http://diuf.unifr.ch/people/huangy/
> Office: +41 26 429 65 95
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-- 
===============================================
Agustin Caminero
Research Assistant.
Computing Systems Department.
Albacete Research Institute of Informatics (I3A).
The University of Castilla La Mancha.
Campus Universitario s/n, 02071, Albacete. Spain.
Phone: +34 967 599 200 Ext. 2693. Fax: +34 967 599 343
http://www.i3a.uclm.es/
===============================================