OpenSUSE Hardware :: XEN Kernel Consumes Memory - How To Fix It
May 20, 2010
My computer has 4GB installed but for some reason I could only see the 2 of the 4. At first I thought that this was because the XEN virtual operating system manager was running but even after I turned it off the problem exists. I could only see and use the 2GB of memory.
Code:
free -m
total used free shared buffers cached
Mem: 1914 1874 39 0 9 295
-/+ buffers/cache: 1570 343
Swap: 2062 1934 128
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Jan 11, 2010
let me know how to clear cache memory ( RHEL 5.1 ) as it consumes almost 100% physical memory.
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Mar 30, 2011
My Ubuntu consumes too much memory. I have checked it with memstat and have found a lot of lines like these:
[Code]...
There are more than 480 lines like this! What are these fontconfigs for? Where do they come from?
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Sep 1, 2010
Rhythmbox stalls my computer. I start it and within 10-20 seconds it starts to search something (i.e. in the right bottom there appears a box with a red box sliding left and right). It consumes all my memory (1 giga) and the only thing it does is identify text files in a general directory, NOT in Music. I have completely removed the install, installed it again, the same text files earlier IDed are still there? Is there an alternative?
Computer details: Intel dual core, Nvidia, 64 bit Lucid. The flaw is that it runs on single memory.
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Oct 5, 2010
I am using ubuntu 10.10 with gnome desktop on a desktop computer (pentium 4 cpu with 1 Gb memory), and when I use OpenOffice Impress, convert opens up and uses most of my cpu power. Even worse, after closing OpenOffice and all instances of nautilus, convert stays in memory and keeps using most of my cpu power (between 30 and 75 %, acccording to system monitor.Is it normal ? How could I set up my computer to limit convert cpu usage, and to unload from memory after being used.
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Dec 31, 2010
I am writing a script that tells me which process consumes the most memory in the system this is what I have but I keep getting an error:
#! /bin/bash
# Autor: Jose miguel Colella
# Descripcion: Que proceso consume mas memoria
ps -e -o %mem -o args | sort -k 1 | tail -n2 | head -n1 | cut -d -f 3
I keep getting this message: cut: delimiter mist be a single character
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Sep 8, 2010
I am having a php script which is used for bulk mailing. I run the script every minute through cron job. I have mentioned the path of the php script in a .sh file and execute the .sh file through cron job. Every time i run the script it utilizes high memory which results to server crash. how to restrict memory usage for that process to be a minimum one or how to set priority to be low for that process so that it is executed when there is no high priority jobs, so that the server runs normally without going down when the script runs
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Oct 6, 2010
I am using the rather old openSUSE 11.0 with no plans of upgrading to 11.3 as of now. My system is also 5+ years with a P4 2.66GHz but with 2.5Gb ram. HD videos are utilizing 100% cpu and the video also keeps shaking. Neither does any other app work during this time. I cannot even stop the player. I've tried mplayer, smplayer, vlc, totem, gnome-player --- all with the same result.
But windows XP utilizes about 60% cpu and so no such problems. I also have ubuntu 7.10 installed and even mplayer here uses 100% cpu. Also not a troublesome issue but XP has higher volume.
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Aug 25, 2010
Is that possible that SHM shared memory is counted as cache memory on Linux with kernel 2.6.18?If find it really odd since this memory is not file backed, but I have a piece of code that loads data using shm_open+mmap, and it generates an amount of cache memory in /proc/meminfo that corresponds exactly to the amount of shared memory (I load that data from a file but I am using posix_fadvise(fd,0,0,POSIX_FADV_DONTNEED) to ensure this file is not cached and I made sure that it is working as expected). As far as I know SHM memory was not tagged as cache memory with kernel 2.6.9.If it is the case it is really unfortunate since normally cache memory can be considered to be part of the "available" memory since it can be flushed promptly but this is clearly not the case with SHM memory... Is there an easy way to get the total amount of used SHM memory on a system?
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Apr 29, 2009
I'm fairly new to linux Red Hat. We are running Rhel 3 on our VM's. We ran into a issue, (Bug 121801 - athlon-smp kernel does not support >4GB of RAM. what the stepos are to upgrade the existing kernel to the new i686? .
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Feb 3, 2010
we found that if we use 'top' to show the memory usage of a server (SuSe Linux 10), we can get virtual memory usage as well as 'Resident memory' usage. For virtual mem or a particular process, it is around 1.1GB, which is large but for resident memory, it only consumes 300MB. Are there anyone who knows what the differences are? I would also like to know whether the difference (1.1GB - 300MB) = 800MB are actually available for use by other applications in the system.
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Jan 12, 2010
i have installed kernel-xen to my centos 5.4 server ( with yum install kernel-xen ). My server has got 8192 mb pyschal ram with PAE kernel; but after i installed xen kernel to system, my ram is being 7919664KB....how can i fix this ? i want see 8192MB RAM with xen kernel
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Dec 8, 2010
I have a server for virtualization (Xen) and when I do a free -m it does not show all the memory (which should be 64GB), it shows 32GB (a considerable difference, isnt it?).
My hardware is a Dell R410 server:
Dual Xeon 5530
64GB DDR3
4x SAS 500GB in RAID 10
I tried to compile Xen 4.0.1 but I can't solve a compile error that it gives me (if you want to take a look: [URL]) that is the end of the compilation including the error. But, I installed Xen from yum directly after reformating the HD and it works fine now.
My kernel version: 2.6.18-194.26.1.el5xen x86_64
CentOS 5.5 64 bit
[root@server1 xen-4.0.1]# cat /proc/meminfo
MemTotal: 33554432 kB
[code]....
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Sep 21, 2015
I have a virtual server with debian and since last Friday a problem. The server is running normally. All sites hosted show no problems. But If I logon via ssh is the CPU usage of all cores goes to 100%. A simple cd (change dir) then takes about 90 seconds. using top or htop bash is the top scorer. Unfortunately I have absolutely no approach what I have to change here or where the misconduct comes from.
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Sep 4, 2010
Why my 10.04 install runs out of memory when it has hardly had chance to load the kernel. The symptoms were that it sometimes will hang after the grub screen with a blinking cursor. My user space splash screen doesn't appear either, it was when I was trying to fix that that I spotted the problem:
from my dmesg file:
Code:
[5.778823] lowmem_reserve[]: 0 0 24846 24846
[5.778829] HighMem free:3204284kB min:512kB low:3852kB high:7196kB active_anon:192kB inactive_anon:256kB active_file:596kB inactive_file:2288kB unevictable:0kB isolated(anon):0kB isolated(file)
:0kB present:3180408kB mlocked:0kB dirty:0kB writeback:0kB mapped:1240kB shmem:144kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:356kB unstable:0kB bounce:0kB writeback_
tmp:0kB pages_scanned:0 all_unreclaimable? no .....
This is a few seconds after loading the kernel.
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Jan 18, 2010
How do I get rid of this message during boot. I have tried the system-config-kdump command but it gives me a "no command found" reply. I am using CentOS 5.4
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Nov 24, 2010
I'm using centos 5.4 on an Hp Compaq 500B, 4GB ram,I have just installed centos when i try to boot the pc it says "memory for crash kernel not in permissible range, pci not using mmconfig" then it shuts down after a while.
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Mar 18, 2010
I've installed LINUX for the very first time and when i rebooted it, i found this message on my screen "Memory for crashkernel notwithin permissible range" I tried all my attempt like given memory to kernel with this command "crashkernel=64M@16M" but no luck... Finally i tried to boot into single user mode might be it helped me..but same results
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Jul 30, 2009
After CentOS5.3 install to /sdb7 partition (on 2nd HD) and using Ubuntu Grub(on 1st HD mbr) to boot CentOS, I get "memory for crash kernel 0x0 to 0x0 not within permissible range" as soon as CentOS starts. I have 2G of ram. The message is on every boot. I've had several other linuxes on that partition without such an error message. Otherwise the OS starts fine. Is the message of concern/import?
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Jan 21, 2010
I just install CentOS 5.4.
The first message it gives after grub is Quote:Memory for Crash Kernel (0X0 to 0X0) notwithin permissible range
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Jan 29, 2010
Recently I am getting problems to open a couple of sites, example: [URL]...Firefox process consumes 70% of the processor when it is open.My flash plugin is sun-java6-jre, ubuntu repositories.Somebody what do know happen? is the flash the responsible ?
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Apr 6, 2010
i noticed few times that my ram usage in gnome increases high. So i found that python is using more than 500 MB Ram. Normally i didn�t notice this python. What does it do?
I am not sure, but i think that these increasing has something to do with skype/empathy (i think it grows after using this programs...
So, i killed the process and ram usage is normal.
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Jul 12, 2010
I've had this problem recently. Whenever I open an open office.org document from a cifs/SAMBA share as I navigate through it my laptop will lock up, and by lock up I mean so bad that I can't even move the mouse. If I let it sit for anywhere from 30 seconds to 2 minutes it will come out of it. Trying to navigate through the document again will trigger a similar episode.
I finally got fed up and opened a terminal with top and set it to always on top, then I opened my samba share, opened my spreadsheet. and proceeded to trigger my problem. When the lockup happened it was so bad and so quick that top stopped updating and I wasn't even able to see something creep up in CPU usage. As it came out of it top started updating in bursts, first ksoftirqd/0 was at 100%, then that dropped to near nothing, then xorg spiked to 100%, then the system returned to normal.
I googled around an found lots of speculation, and bug reports that were way above my head. Some of the speculation suggested it was a kernel issue, but that has supposedly been fixed. Another forum post said that it was a multi-processor issue. (the guy was running it in a vm so he just removed the vCPU) And yet another suggested a network issue/attack. I am running a Dell Latitude D620 with a dual core Intel proc and a Broadcomm network card (wired) and an Intel wireless card. I have all the latest updates. The shares I experience this issue with (only shares I really use) are on a Netapp and are active directory integrated (my laptop is not joined to the domain)
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Jan 31, 2010
I am having a problem with lockups on a new FC12 box (dual core 3 ghz, 4 gb memory,HDPVR,nvidia 8400gs). This happens reliably when replaying MythTV videos, but also randomly at other times using other apps (I suspect also boot but I can't be sure; it just occasionally stalls part way through the boot display).
Usually but not always this is accompanied by a kernel panic (caps lock + scroll lock lights flash on keyboard).
I did a core dump with kdump and it reports:
Thread 1 (<main task>):
Cannot access memory at address 0xffff880028025b70
I am in the process of running memtest86+ right now, and it's been through several passes without errors. I know it needs to run more, but given the reliability of this problem with MythTV video playback I am wondering if the problem could be in the video card memory.
Does anyone know of a linux (or bootable) tester for video memory? All I am able to find are some things for windoze like this.
Also is there any way to track that address from the core dump back to a physical location?
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Aug 7, 2011
this is a dual boot XP/UBUNTU 10.04. while using XP, the computer rebooted itself. the GRUB's screen appears, but neither the ubuntu nor the XP option works.
Ubuntu gives this error message:
Code:
0.797795 kernel panic-not syncing: vfs: enable to mount root fs on unknown-block (0,0)
XP hangs on a black screen... and that is it (thanks for support windows!) UBUNTU 10.04 live CD hangs when the 5 processing dots appears bellow the ubuntu logo. hangs the same way with the processing bar in UBUNTU 9.04 live CD. memory check (memtest86) is showing thousands of errors right from the start.
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Jan 31, 2010
I am having a problem with lockups on a new FC12 box (dual core 3 ghz, 4 gb memory, HDPVR, nvidia 8400gs). This happens reliably when replaying MythTV videos, but also randomly at other times using other apps. Usually but not always this is accompanied by a kernel panic (caps lock + scroll lock lights flash on keyboard).
I did a core dump with kdump and it reports:
Thread 1 (<main task>):
Cannot access memory at address 0xffff880028025b70I am in the process of running memtest86+ right now, and it's been through several passes without errors. I know it needs to run more, but given the reliability of this problem with MythTV video playback I am wondering if the problem could be in the video card memory. Any linux (or bootable) tester for video memory? All I am able to find are some things for windoze such as this. Also is there any way to track that address from the core dump back to a physical location?
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Jan 27, 2010
I installed CentOS 5.4.. I saw this message: Memory for crash kernel (0x0 to 0x0) notwithin permissible range Is it ok? I google around it said that it is a known issue and harmless. I installed CentOS 5.2 before. It was ok. Kernel is 2.6.18 too. Just wonder why Kernel version: Linux phot1-nec4 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
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Aug 16, 2009
Aug 16 21:41:14 server1 kernel: __ratelimit: 6 callbacks suppressed
Aug 16 21:41:14 server1 kernel: Out of socket memory
Aug 16 21:41:29 server1 last message repeated 21 times
KERNEL: 2.6.26.6
my sysctl.conf:
Code:
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.lo.accept_source_route = 0
net.ipv4.conf.eth0.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.all.rp_filter = 1
code....
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Jun 5, 2011
I'm running Ubuntu 11.04 (64bit) on my Thinkpad X220. When I watch flash videos I see that Xorg consumes a lot of resources (CPU time). Flash videos in full screen are extremely choppy. Playing videos with Mplayer, for example, is no problem at all. Any ideas how this can be fixed? I found lots of posts by other people with similar problems but they had different graphics cards so their solutions were not applicable in my case.
Code:
Linux montana 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
grep 'model name' /proc/cpuinfo | uniq:
[Code]...
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Mar 21, 2011
When I start bluej and try to open files from my memory stick the memory stick is not available. Is there any way that I can open files directly in bluej from my memory stick.
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