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[Xen-users] RAM issue

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] RAM issue
From: "Arpan Jindal" <jindalarpan@xxxxxxxxx>
Date: Mon, 6 Oct 2008 23:04:16 +0530
Delivery-date: Mon, 06 Oct 2008 10:35:04 -0700
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Hi
i am pasting outputs again. according to the calculation of adding the
domain RAM and guest machine memory total should be 16 gb. and
according to this calculation i should have created more virtual
machines but when i create any new virtual machine i am getting error
message as out of memory.

out put of servers as
[root@mumxen01 ~]# xm info
host                   : mumxen01
release                : 2.6.18-8.el5xen
version                : #1 SMP Fri Jan 26 14:29:35 EST 2007
machine                : x86_64
nr_cpus                : 8
nr_nodes               : 1
sockets_per_node       : 2
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 2000
hw_caps                :
bfebfbff:20000800:00000000:00000040:000ce33d:00000000:00000001
total_memory           : 16383
free_memory            : 0
xen_major              : 3
xen_minor              : 0
xen_extra              : .3-rc5-8.el5
xen_caps               : xen-3.0-x86_64 hvm-3.0-x86_32 hvm-3.0-x86_32p
hvm-3.0-x86_64
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : unavailable
cc_compiler            : gcc version 4.1.1 20070105 (Red Hat 4.1.1-52)
cc_compile_by          : brewbuilder
cc_compile_domain      : build.redhat.com
cc_compile_date        : Fri Jan 26 14:12:03 EST 2007
xend_config_format     : 2
[root@mumxen01 ~]# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0     9954     8 r-----   4126.1
server104                                 9     4117     1 r-----    124.6
server201                                 3     2064     1 -b----   1379.9
[root@mumxen01 ~]#














[root@mumxen002 ~]# xm info
host                   : mumxen002
release                : 2.6.18-53.el5xen
version                : #1 SMP Wed Oct 10 16:48:44 EDT 2007
machine                : x86_64
nr_cpus                : 8
nr_nodes               : 1
sockets_per_node       : 2
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 2000
hw_caps                :
bfebfbff:20000800:00000000:00000040:000ce33d:00000000:00000001
total_memory           : 16383
free_memory            : 1043
xen_major              : 3
xen_minor              : 1
xen_extra              : .0-53.el5
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : unavailable
cc_compiler            : gcc version 4.1.2 20070626 (Red Hat 4.1.2-14)
cc_compile_by          : brewbuilder
cc_compile_domain      : build.redhat.com
cc_compile_date        : Wed Oct 10 16:30:57 EDT 2007
xend_config_format     : 2
[root@mumxen002 ~]# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0     6256     8 r----- 203351.6
server101                                 1     2007     1 -b----  40379.6
server102                                 2      519     1 -b----  34517.6
server103                                 3      519     1 -b----  39044.9
server104                                 4     1039    1 -b----  39124.1
server105                                 5      519     1 -b----  49120.2
server106                                 6      519     1 -b----  39234.6
server107                                 7      519     1 -b----  37777.7
server108                                 8      519     1 -b----  37907.9
server109                                 9      519     1 -b----  36942.6
server110                                10      519     1 -b----  30085.9
server111                                11      519     1 -b----  26556.0
server112                                12      519     1 -b----  76582.5
server113                                17      519     1 -b----  42216.1
server114                                16      519     1 -b----  26396.7
server115                                18      519     1 -b----  26633.9
[root@mumxen002 ~]#

kindly let me know what could be issue . or where it could be solved.

Thanks


On Fri, Oct 3, 2008 at 11:59 PM, Rob MacGregor <rob.macgregor@xxxxxxxxx> wrote:
> On Fri, Oct 3, 2008 at 19:24, Arpan Jindal <jindalarpan@xxxxxxxxx> wrote:
>> Hi All
>>
>> I am having 2 physical machine of exactly same configuration and same
>> hardware.  Both are having 16GB of RAM. But when I check one machine
>> its shows only 6GB but other one shows complete physical memory(16GB).
>> Is there any settings that need to be changed. To make complete 16 gb
>> memory available.
>>
>> Both are having RHEL 5.2 installed and having xen that come bundled with it.
>>
>> But in BIOS both machine is showing 16GB.
>>
>> Output of the machine where 16 memory is available.
>>
>> [root@mumxen01 ~]# free
>>
>>             total       used       free     shared    buffers     cached
>> Mem:      14429184     973244   13455940          0      56728     398408
>> -/+ buffers/cache:     518108   13911076
>> Swap:     10241428          0   10241428
>
> Shows roughly 14 GB available to dom0
>
>> [root@mumxen01 ~]# xm list
>> Name                                      ID Mem(MiB) VCPUs State   Time(s)
>> Domain-0                                   0    14091     8 r-----    175.8
>> server201                                 3     2064     1 -b----     10.1
>
> Total, between dom0 and domU about 16 GB
>
>> Output of the machine where 16GB memory is not available .
>>
>> [root@mumxen002 ~]# free
>>             total       used       free     shared    buffers     cached
>> Mem:       6406144    6380060      26084          0      67128    5569972
>> -/+ buffers/cache:     742960    5663184
>> Swap:      5245212        148    5245064
>
> Shows about 6 GB available to dom0
>
>> [root@mumxen002 ~]# xm list
>> Name                                      ID Mem(MiB) VCPUs State   Time(s)
>> Domain-0                                   0     6256     8 r----- 180836.0
>> server101                                 1     2007     1 -b----  28981.2
>> server102                                 2      519     1 -b----  25015.7
>> server103                                 3      519     1 -b----  28607.5
>> server104                                 4     1031     1 -b----  84507.4
>> server105                                 5      519     1 -b----  38746.8
>> server106                                 6      519     1 r-----  28538.8
>> server107                                 7      519     1 -b----  27493.2
>> server108                                 8      519     1 -b----  27084.5
>> server109                                 9      519     1 -b----  25775.3
>> server110                                10      519     1 -b----  21892.7
>> server111                                11      519     1 -b----  19579.8
>> server112                                12      519     1 -b----  57347.3
>> server113                                17      519     1 -b----  34197.6
>> server114                                16      519     1 -b----  19571.7
>> server115                                18      519     1 -b----  19732.2
>
> Shows a total of about 16 GB, roughly 10 GB used by the domUs.
>
> Everything looks right to me.
>
> --
>                 Please keep list traffic on the list.
>
> Rob MacGregor
>      Whoever fights monsters should see to it that in the process he
>        doesn't become a monster.                  Friedrich Nietzsche
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>

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