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Kernal Problem ! [message #33053]

Sat, 20 September 2008 11:04

Java
Messages: 11
Registered: August 2008
Location: Time

Junior Member

Hi palls,

I've a problem with kernel
after updating kernel , Server memory has become much less
and after 12 Gb the server memory become only 3 Gb

now it's
---------
free -m
total used free shared buffers cached
Mem: 3286 3107 178 0 194 1752
-/+ buffers/cache: 1161 2124
Swap: 12291 5 12286
---------

and i need you to help me to solve that problem fast because some vpss are down now because of memory .

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Re: Kernal Problem ! [message #33059 is a reply to message #33053]

Sat, 20 September 2008 18:51

piavlo
Messages: 159
Registered: January 2007

Senior Member

Which system do you have 32 or 64 bit?
I looks like you compiled a 32 bit kernel to support up to 4G of virtual memory. Where 1G is used for kernel space and 3G for user space. You need to set CONFIG_HIGHMEM64G

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Re: Kernal Problem ! [message #33060 is a reply to message #33053]

Sat, 20 September 2008 21:40

Java
Messages: 11
Registered: August 2008
Location: Time

Junior Member

OS : Centos 4 32 bit

[root@host01 ~]# uname -a
Linux host01.sitename.com 2.6.18-92.1.1.el5.028stab057.2 #1 SMP Mon Jul 21 20:55:45 MSD 2008 i686 i686 i386 GNU/Linux

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Re: Kernal Problem ! [message #33061 is a reply to message #33060]

Sat, 20 September 2008 21:51

LinuxGeek
Messages: 13
Registered: April 2008
Location: Egypt

Junior Member

Hello,
recompile your kernel with with PAE check this link
http://wiki.openvz.org/Different_kernel_flavors_(UP%2C_SMP%2C_ENTERPRISE%2C_ENTNOSPLIT)

if you want do it from rpm's

rpm -ihv http://download.openvz.org/kernel/branches/rhel5-2.6.18/028stab057.2/ovzkernel-PAE-2.6.18-92.1.1.el5.028stab057.2.i686.rpm

rpm -ihv http://download.openvz.org/kernel/branches/rhel5-2.6.18/028stab057.2/ovzkernel-PAE-devel-2.6.18-92.1.1.el5.028stab057.2.i686.rpm

and configure your grub

vi /boot/grub/grub.conf

default=0

Alaa Eldin

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Re: Kernal Problem ! [message #33063 is a reply to message #33053]

Sun, 21 September 2008 00:15

Java
Messages: 11
Registered: August 2008
Location: Time

Junior Member

rpm -ihv http://download.openvz.org/kernel/branches/rhel5-2.6.18/028s tab057.2/ovzkernel-PAE-2.6.18-92.1.1.el5.028stab057.2.i686.r pm
Retrieving http://download.openvz.org/kernel/branches/rhel5-2.6.18/028s tab057.2/ovzkernel-PAE-2.6.18-92.1.1.el5.028stab057.2.i686.r pm
Preparing... ########################################### [100%]
package ovzkernel-PAE-2.6.18-92.1.1.el5.028stab057.2 is already installed
[root@host01 ~]# rpm -ihv http://download.openvz.org/kernel/branches/rhel5-2.6.18/028s tab057.2/ovzkernel-PAE-devel-2.6.18-92.1.1.el5.028stab057.2. i686.rpm
Retrieving http://download.openvz.org/kernel/branches/rhel5-2.6.18/028s tab057.2/ovzkernel-PAE-devel-2.6.18-92.1.1.el5.028stab057.2. i686.rpm
Preparing... ########################################### [100%]
package ovzkernel-PAE-devel-2.6.18-92.1.1.el5.028stab057.2 is already installed

===========
the grub.conf

 grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/sda3
#          initrd /initrd-version.img
#boot=/dev/sda
default=2
timeout=5
#splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-92.1.1.el5.028stab057.2ent)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-92.1.1.el5.028stab057.2ent ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.18-92.1.1.el5.028stab057.2ent.img
title CentOS (2.6.18-92.1.1.el5.028stab057.2PAE)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-92.1.1.el5.028stab057.2PAE ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.18-92.1.1.el5.028stab057.2PAE.img
title CentOS (2.6.18-92.1.1.el5.028stab057.2)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-92.1.1.el5.028stab057.2 ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.18-92.1.1.el5.028stab057.2.img
title CentOS (2.6.18-53.1.19.el5.028stab053.14ent)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-53.1.19.el5.028stab053.14ent ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.18-53.1.19.el5.028stab053.14ent.img
title CentOS (2.6.18-53.1.19.el5.028stab053.14PAE)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-53.1.19.el5.028stab053.14PAE ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.18-53.1.19.el5.028stab053.14PAE.img
title CentOS (2.6.18-53.1.19.el5.028stab053.14)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-53.1.19.el5.028stab053.14 ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.18-53.1.19.el5.028stab053.14.img
title CentOS (2.6.9-67.0.15.ELsmp)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-67.0.15.ELsmp ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.9-67.0.15.ELsmp.img
title CentOS (2.6.9-67.0.15.ELhugemem)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-67.0.15.ELhugemem ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.9-67.0.15.ELhugemem.img
title CentOS (2.6.9-67.0.15.EL)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-67.0.15.EL ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.9-67.0.15.EL.img
title CentOS-4 i386 (2.6.9-67.ELsmp)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-67.ELsmp ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.9-67.ELsmp.img
title CentOS-4 i386-up (2.6.9-67.EL)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-67.EL ro root=LABEL=/ console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.9-67.EL.img

Thanks for your response

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