[Fedora-xen] physical memory is reduced :-(

[Andrew Cathrow]

run "xm list" and you see memory allocations to each domain.
If you run "xm mem-set " you should be able to allocate that memory to
domain 0 (if it needs it)

xm mem-set 0 512

Would allocate 512MB to domain 0.


On Mon, 2007-03-05 at 16:39 -0400, John Sanabria wrote:

> Hi,
> 
> i had installed the last updates for FC6 in a machine with 1 Giga of RAM.
> The machine's ip is 136.145.116.88.
> 
> ------------------------------------------------------
> [root at dhcp-crl-116-88 ~]# free
>              total       used       free     shared    buffers     cached
> Mem:        962032     281512     680520          0      16116     191412
> -/+ buffers/cache:      73984     888048
> Swap:      2031608          0    2031608
> [root at dhcp-crl-116-88 ~]# uname -a
> Linux dhcp-crl-116-88.ece.uprm.edu 2.6.19-1.2911.6.4.fc6xen #1 SMP Sat Feb
> 24 14:57:17 EST 2007 i686 i686 i386 GNU/Linux
> ------------------------------------------------------
> 
> now, i execute a "xm create xentemplate_6 -c", and voila! i lost approx
> 250 Mbytes of PHYSICAL RAM, :-(
> ------------------------------------------------------
> [root at dhcp-crl-116-88 ~]# free
>              total       used       free     shared    buffers     cached
> Mem:     -> 764928 <-  375796     389132          0      17536     281980
> -/+ buffers/cache:      76280     688648
> Swap:      2031608          0    2031608
> ------------------------------------------------------
> 
> then, shutdown the virtual machine, and i did not get back the lost 250
> Mbytes of RAM.
> anybody knows how to get back my physical memory after to shutdown the
> virtual machine? is that behavior a bug?
> 
> if i run two virtual machines, my physical memory is reduced until 512 MB
> of Physical RAM. At this time, the only way to get 1Gbyte of RAM is
> rebooting the machine :-(.
> 
> Thanks a lot for your suggestions.
> 
> http://ece.uprm.edu/~s047267
> http://del.icio.us/josanabr
> http://blog-grid.blogspot.com
> 
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--

Andrew Cathrow
Red Hat, Inc.

(678) 733 0452 - Mobile
(404) 437 6178 - Home Office

acathrow at redhat.com
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