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Centos 64 bit only seeing 3834MB Ram
Posted on 2011-09-05
Hi
i have installed Centos 64 bit on Windows 2008 Hyper -V.
guest has 5012 Ram
so centos should see 5GB of ram.
but its only see 3834 mb Ram !!
some info :
free -m
total used free shared buffers cached
Mem: 3834 89 3745 0 13 35
-/+ buffers/cache: 40 3794
Swap: 2943 0 2943
[root@sandbox ~]#
[root@sandbox ~]# uname -a
Linux sandbox. 2.6.18-238.19.1.el5 #1 SMP Fri Jul 15 07:31:24 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux
but
when i boot the same vm with Debian live 64 bit, its see full memmory
I never seen this problem before
can any one help me with this
thanks
i have installed Centos 64 bit on Windows 2008 Hyper -V.
guest has 5012 Ram
so centos should see 5GB of ram.
but its only see 3834 mb Ram !!
some info :
free -m
total used free shared buffers cached
Mem: 3834 89 3745 0 13 35
-/+ buffers/cache: 40 3794
Swap: 2943 0 2943
[root@sandbox ~]#
[root@sandbox ~]# uname -a
Linux sandbox. 2.6.18-238.19.1.el5 #1 SMP Fri Jul 15 07:31:24 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux
but
when i boot the same vm with Debian live 64 bit, its see full memmory
I never seen this problem before
can any one help me with this
thanks
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12 Comments
Active today
You need to insall the kernel-pae version
yum install kernel-pae
http://www.centos.org/modules/newbb/viewtopic.php?topic_id=8457
yum install kernel-pae
http://www.centos.org/modules/newbb/viewtopic.php?topic_id=8457
Active today
add mem=5012MB to grub.conf
http://www.centos.org/docs/5/html/Installation_Guide-en-US/ch06s04.html
http://www.centos.org/docs/5/html/Installation_Guide-en-US/ch06s04.html
MemTotal: 3926888 kB
MemFree: 3804900 kB
Buffers: 6680 kB
Cached: 36688 kB
SwapCached: 0 kB
Active: 55816 kB
Inactive: 27808 kB
MemFree: 3804900 kB
Buffers: 6680 kB
Cached: 36688 kB
SwapCached: 0 kB
Active: 55816 kB
Inactive: 27808 kB
Active today
I think there is a setting for grub to reflect a larger memory alocation.
Try centos 6 liveCD and see if it too reflects the lower memory.
Try centos 6 liveCD and see if it too reflects the lower memory.
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