My server crashed last week and I'm trying to diagnose why. /var/log/messages contains the following error messages, which indicate that the server's memory peaked. I would like to discover what process caused the memory peak. Being that "httpd invoked oom-killer", can I conclude that httpd was the cause of the memory peak?
[code]....
Last week my server crashed. I'm trying to diagnose the cause.
This is the relevant error message in /var/log/messages:
Code:
I'm assuming that I can conclude, then, that apache/httpd was the cause of the memory leak?
Next, I've been tracking my memory usage. Using top, this is an average memory load level for my server:
Code:
I'd like to confirm if my understanding of this data is correct, because Plesk indicates that my memory usage is only 50% or less. (Though I have read a number of reports indicating that Plesk's measurements are frequently wrong.)
Top says: Of the 2,073,156K total memory, 1,982,572K (95.63%) is being used, 90,584K (4.37%) is free. Of that sum, 421,948K (20.35%) are being used as buffers. Additionally, of the 2,096,472K of Swap, 60K is used, and 887,700K (42.34%) is cached.
My questions: Is my memory actually being 95% used? Or is the buffered quantity (20.35%) not a use of physical/virtual memory? (i.e. is it disk usage?) Does the amount of cached Swap influence the percentage of physical/virtual memory being used?
In other words, who is correct? Plesk says I'm using 40-50% of my memory, whereas top says 85-95%.
I would like to find something like `time' command:$ magic_command ./executable...memory peak: 100kb
View 2 Replies View RelatedI am running Ubuntu 10.10 (amd64) on an Intel Atom 525 motherboard. I have a 5-bay SATA enclosure connected to my system through a Syba SD-SATA2-2E2I PCI card (uses the SIL3124 chipset). Under small to moderate load (transfer speed: ~25 Mb/sec), this setup works perfectly. Under heavy load (transfer speed: ~40 - 70 Mb/sec), the system crashes. By crash I mean I loose SSH connectivity, I can't ping the system, etc. The only solution is a hard reset. Initially, I thought this was a SAMBA problem so I logged into the system and tried doing a copy directly from the SATA enclosure to the system disk (connected directly to the motherboard). After 100 GB copied (at ~75 Mb/sec), the system crashed. My question: I am fairly new to Linux and Ubuntu. How would I go about diagnosing this problem?
View 5 Replies View RelatedI have a server in a data centre, which is supposed to have a 100Mbit line. Peak rates at the moment on my server are in the region of 20Mb, which should be easily handled. Is there anyway I can trace how much more bandwidth is available at any one time or if things are becoming sluggish on the server?
View 4 Replies View RelatedBasically I have a machine with 16GB of RAM and have just discovered that using all of it can crash the whole system over one process. How could I run a process on the system in such a way that if more than 90% of system memory is used, the process immediately crashes?
View 3 Replies View RelatedHow 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
View 1 Replies View RelatedSomething is running my memory up and causing my load to crash my forum. I keep noticing this error and have no clue really how to go about fixing it.
Quote:
%CPU PID USER COMMAND
1.2 2978 mysql /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --log-error=/var/lib/mysql/server.forumnameremoved.com.err --pid-file=/var/lib/mysql/server.forumnameremoved.com.pid
Could this be causing my CPU to run high? How would I go about fixing an error like this or is it even doable?
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.
View 1 Replies View RelatedI'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
View 3 Replies View RelatedAfter 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?
View 3 Replies View Relatedit says this at start of boot:memory for crash kernell (00x00 'or something like that') not within permisiable rangeotherwise no problems for now, ewerything runs fine.
View 4 Replies View RelatedI just install CentOS 5.4.
The first message it gives after grub is Quote:Memory for Crash Kernel (0X0 to 0X0) notwithin permissible range
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
View 2 Replies View Relatedlet me know how to clear cache memory ( RHEL 5.1 ) as it consumes almost 100% physical memory.
View 3 Replies View Relatedwe 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.
View 1 Replies View RelatedI have been setting up a vps I got out with bhost.net, with CentOS installed. I've been learning and have set up everying I need with the exception of ftp/sftp.
Using yum I installed vsftpd and ran into problems, thinking it was something I might of done I did a fresh install of CentOS and I still recieve the same problem on a fresh install so it is nothing I have done to the server.
The problem is when connecting via a sftp client I get an out of memory error. This error is listed in the putty faq ( url ) under A.7.5, there is a brief explaintion of the cure under A.7.6.
there is mention of a login script but I don't know where this is located. I'm a novice at Linux but by no means incompotent when it comes to computing.
I'm not really a beginner but i will post here, i think there is a simple issue here.
I set up a new cloud server (debain 6) at CloudSigma, it has a joomla site on it, prob gets about 2000 visitors a day
Yesterday i unleashed it on the world , it was all ok when i went to bed.
At about 5.20 or 5.30 it went down, i found this out from App First notification, shame i didnt see the email until this morning lol.
Anyway there is no logical explanation as to why this would happen, how to diagnose this.
I have a PEAK 102569AGPK that I can't get to play nice.
Using Ubuntu Netbook 10.10
lsusb-v gives this:
But no driver is being found - dmesg: usb 1-1: new high speed USB device using ehci_hcd and address 6
Works well under windows, which identifies it as an rtl2832u. I've tried installing Realtek-provided drivers, but still device is not found.
I'm wondering if I could get the sound peak level value at a certain time in decibels or percentage using the terminal through a command line ? Is there a feature for ALSA that could allow me to do that ? or is there a piece of software that runs in a terminal that could do that ?
View 3 Replies View RelatedHow i can know processor utilization during peak period in rhel 5.3.
View 5 Replies View RelatedI have a query regarding top & virtual memory. When we run top it show VIRT (Virtual Mem), RES (Resident Mem) & SHR (Shared Memory). The total virtual memory of my machine is 4 GBs (2 GB RAM + 2 GB Swap), but still I am able to see a process showing 4000m virtual memory column. what it means, as its show VIRT Mem more than actual available VIRT memory
View 1 Replies View RelatedWhen trying to run MS Communicator 2007 in XP hosted by Ubuntu 9.10 using VirtualBox 3.1.6, the Communicator process inside the virtual image maxes out (90%+) and it becomes unusable (host reports VBox at 50% CPU). If I migrate that image to a Windows host, VBox does not show the same issue (Communicator process ranges from 20-35%). Creating a similar VMware image on the Ubuntu host and running it also does not show the issue (Communicator process ranges from 20-35%). So obviously there is some kind of bottleneck occurring with VBox on Ubuntu. My questions is, how do I figure out what that bottleneck is?
View 2 Replies View RelatedIs it possible to like have SMS sent to your cellphone when the server crashes or a process on the server dies?
View 4 Replies View RelatedThe problem is random but reproducible: go to http://www.tvbythenumbers.com/, navigate around for a while, click some links...eventually firefox (3.6.3 on 10.04) will crash. I tried running firefox from the command line, but all it says is 'Segmentation fault' with no details. What can I do to diagnose this?
View 3 Replies View RelatedI am struggling to get my wireless usb working on a fresh installation of Ubuntu Server 10.04, but it works just fine on a fresh install of Ubuntu Desktop 10.04. So I am trying to work out what's causing the discrepancy. I know the Server version is a "minimal install" of Ubuntu, so something must be missing that affects its overall abilities.
I am planning to compare the file system of a totally fresh Desktop version with a Server version - and would appreciate as much additional brain-power as possible to assist in the plan/execution of what I should be comparing. I hope this will throw up a solution as to what is NOT installed/configured on the Server version that prevents my wireless from working. [It will teach me a lot as well ] COMPARISON PLANAll programs installed on both file systems (looking for differences) Program differences which affect network setup and related hardware (I'm not sure of what this list should have on it) Related configuration files which might affect connectivity (same here - not sure what configures what at this stage)
* Do $lsmod to look for installed wireless drivers Miscellaneous tests
* Disable security on wireless router to see if security config is the cause I'm not sure if the kernel build will be different and if so how to establish this... but somehow wonder if this affects the outcome
If anyone is willing to assist in filling out the gaps in this plan I would really appreciate it. Or maybe there is a better way?
How to diagnose a possibly failing harddisk. This is the system disk of a Windows XP machine that will not boot. It gets to the "progress bar" that runs across the screen a few times but then it always stops in the same spot. If I boot from a live Ubuntu CD what tools should I use to find out if the disk itself is failing? The disk is under warranty but if I take it to the shop and the problem turns out to be software errors then I have to pay so I want to be sure what is going on before going there..
View 9 Replies View RelatedLast weekend i've set up my first headless ubuntu home file server and torrent downloader with ubuntu 9.10.Very cool but CPU is way too fast for a home server: P4 HT 2.8Ghz, unfortunatly it has only 256Mb of ram, so no X server and no VNC (old HP office pc) At the moment memory usage is only 40Mb without X server. Besides SSH works just fine Few questions i can't seem to find answers to on google:What is a good CL network monitoring program?mething similar to htopUbuntu 9.10 has a lot, about 20-30, console-kit deamon instanses running after boot each using some memory that i can't spare.
View 2 Replies View RelatedA recent yum -y update produced the same error on a half dozen boxes: --> Finished Dependency Resolution gnome-phone-manage 0.65-1.fc11.x86_64 from installed has depsolving problems --> Missing Dependency: libgnome-bluetooth.so.2()(64bit) is needed by package gnome-phone-manager-0.65-1.fc11.x86_64 (installed) Error: Missing Dependency: libgnome-bluetooth.so.2()(64bit) is needed by package gnome-phone-manager-0.65-1.fc11.x86_64 (installed) So I did the following:
[code]....
I am at a loss as to what the complaint is about. Everything appears to be in order and the application works just fine. Can anyone tell me what yum is complaining about?
Just wanted to share this with anyone wanting to know.If your headless server crashes, GRUB2 (at least on Ubuntu Server) is designed to force the GRUB menu to load up next time it starts up, which means you are locked out of SSH until someone physically makes a kernel selection on the PC.To prevent this do the following change to your grub.cfg file.#nano /boot/grub/grub.cfg
I was looking for a solution for this for a long time and found no hel with google. Let me know if there is a better way.I aware this file will get overwritten and need reediting if the Kernel gets updated.