Ubuntu :: When First Boot Up, Already Using 70% Of Memory?
Jun 3, 2010
My system has been running really sluggishly for a while and I've finally identified the problem. I'm using all my memory which is causing swapping to occur.When I started trying to fix this problem though, I began to notice some strange things. For example, I wanted to figure out what processes were taking up all my memory, and the answer I found was that none of them are. While every tool I use to see how much memory I'm using (sysinfo, top, etc.) reports that I'm pretty much using all 2 GiB plus some swap space, all the process lists that I look at (top, system monitor) only account for maybe 750 MiB of memory. Yes, I'm seeing root processes not just my own.When I first boot up, I'm already using 70% of my memory. This happens whether I run kdm/gdm and boot into KDE or Gnome. I'm running Ubuntu 10.04.installed 9.04 last year when I got the computer and then upgraded to 9.10 and then 10.04 without doing a clean reinstall
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May 20, 2010
I have just upgraded to 10.04 and everything was working perfectly, until I upgraded my memory. I cannot boot from live USB / CD - these take me to the initial boot option menu, from which every option (except memory test) results in blinking cursor top left of screen, and cannot type.
Reinstalling my old memory sticks results in the system working fine. The new memory sticks pass memory tests (bios & ubuntu boot) with no errors whatsoever, and the boot sequence progresses fine until the point where the OS tries to boot. I am running AMD Athlon 64 3200+, Asus K8V Deluxe m/b. Memory that works is 2x 512mb PC3200 XMS. Memory that doesn't work is 3x 1gb PC2700 ECC. but please provide instructions on the basis that I know nothing, because I no practically very little about linux / ubuntu.
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Jun 14, 2010
I am new to ubuntu and linux in general, I've been using it for about a week and I like it very much. The only problem is that I have an ipod touch and I purchase music and video from the itunes store from the device. I can import music but not the items purchased as it is encrypted so I need to use itunes. I installed virtualbox so that I could use xp (only to allow me to use itunes) but as I have a netbook with no disk drive I want to boot from a usb memory stick. Virtualbox doesn't appear to allow this so I am a bit stuck.
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Jun 15, 2010
I'm trying to run a logging server with encryption but rsyslog takes 100% of the memory on boot. This only happens when these two sets of lines are both in the rsyslog.conf
Code:
$ModLoad imtcp
$InputTCPServerRun 10514
and
Code:
$DefaultNetstreamDriver gtls
[Code]...
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Dec 30, 2015
When Debian OS is booted in to memory, this is a clean boot, because with the iso on the DVD can not be tampered with, but someone who has hacked your modem, can target your IP and can place a keylogger in the RAM memory, side-by-side of the OS, does not necessarily need to know zero-day-exploits of Debian (if there are any). Is that correct?
Moreover the trick, once known and automated, can be repeated every time you boot from the Debian Live DVD?
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May 2, 2010
I just changed this computer to dual boot. Windows properly sees 8 gigs of ram. I put them in myself. I know they are good.
When I was checking the system monitor in ubuntu I noticed it only sees 3.2 gigs of ram. That is less then half.
I am on Lucid Lynx 10.04. It's setup for dual boot vista and ubuntu.
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May 13, 2010
Upgraded to 10.04 with proprietary Nvidia driver. No plymouth at boot, but dmesg gives error below. On shutdown get large plymouth display. Tried several hints but none work.
2.985912] 1179648 pages RAM
[ 2.985914] 951810 pages HighMem
[ 2.985915] 149486 pages reserved
[ 2.985916] 642 pages shared
[ 2.985917] 208097 pages non-shared
[Code]...
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Mar 18, 2011
I have a computer with 16GB of ram. At the moment, top shows all the RAM is taken, (NOT by cache), but the RAM used by the various processes is very far from 16GB.I have seen this problem several times, but I don't understand what is happening.My only remedy so far has been to reboot the machine.
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Apr 19, 2010
I get this error when I run "sudo apt-get install python-software-properties"
Preconfiguring packages ...
dpkg: unrecoverable fatal error, aborting:
fork failed: Cannot allocate memory
E: Sub-process /usr/bin/dpkg returned an error code (2)
I'm trying to install deluge via ssh and my vps has 512mb ram and is only using 11% of it prior to running the code.
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Dec 16, 2010
I run my linux server on the Fedora 11 x86_64 flavour of linux. It did have 1GB of DDR SDRAM PC2700 (Crucial) in the first DIMM slot. It worked fine, however i felt the need to add more RAM to the server. So I purchased 2Gb from Crucial 2 * 1Gb memory stick of DDR SDRAM PC2700 333 CL2.5. However when these are used the machine goes through grub begins booting and then hangs. Sometimes it goes through to the login screen where it hangs, othertimes it hangs after logging in. I have performed a memory test and the results come back fine. However if I just use a single stick of memory the server boots fine (Either stick of memory works).The Machhine is dual boot and my XP professional partition always boots fine
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Jan 29, 2011
I have had a fresh install of Ubuntu 9.10 and installed some software after that.Since third some, some process is eating half of my memory.I have checked processes running in system manager but everything is normal.Maximum is consumed by compiz which is about 26 mb, seems very normal.I did restarted my computer several times, and in the start for 5 mins, its fine after that again my cpu fans runs at very fast speed and my one cpu is used up 95 % (I have dual core).Please help me out, this invisible thing is driving me crazy.I am attaching my htop screen shot (sorted by cpu %), now the cpu is not used by completely but fan is still struggling hard and fast.
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May 9, 2009
I have been using for over a year now, my 64-bit computer first with Fedora 8 and now with Fedora 10 with 2Gb of RAM just fine. Today I purchased an extra 2Gb for the system and upon installation from the GRUB screen Fedora 10 simply won't boot. It does boot with 3Gb, and it doesn't matter which stick I use for the 3Gb configuration, or what slot do I put the sticks into the motherboard, however if I place the four sticks, F10 simply won't boot. Should I pass a command line argument tot he kernel? If so, which?
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Apr 20, 2010
I am using malloc and frees a lot in my program. It shows its allocated but when i remove it doesnt show as the memory is removed(I am using the top command to view VIRT memory usage). If this continously grows what would happen to my program (Will it go out of memory?)
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Feb 7, 2011
Fedora 14 xfce
HP Mini 210
I am looking to buy some memory for my netbook. Currently I have 1 GB of DDR3 memory. However, the specification says that 2 GB of memory is the max. However, when I do the following it says that 4GB is the max:
[Code].....
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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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May 3, 2011
I am looking for free database that has low memory usage and innodb and memory like engins that has C API and support trigger and client/server support for using in embedded linux systems.
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Mar 21, 2011
I am new to C and linux. My code below does arbitary writes but I cant figure out where or how it does it.
I am calling the insertNode() function with seq = 'MISSISSPPI$' and alphabets = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ$'
Code:
Weird behaviour I should mention is that when I check for NULL pointer in node->child[index], the unassigned values are not null anymore, they point to arbitary memory.
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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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Apr 13, 2010
How do I write a script for my Linux that can show me total memory vs used memory and have it email me results if it's over 70 percent?
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Oct 20, 2010
I am monitoring physical memory in a server I administer, and my hardware provider told me they had increased physical memory size to 4Gb... However, using several tools (free -m; top; dmesg | grep Memory; grep MemTotal /proc/meminfo I discovered that I actually have 3Gb, not 4... But, my doubt comes from the fact that dmesg | grem Memory tells me I have 3103396k/4194304k available The first number is effectively 3Gb, but the second one, is 4! so, why I am looking at this two different numbers?
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Nov 22, 2009
I am writing an application that wants to access periphals registers outside the standard (allowed) memory area.
Doing so gets me "segmentation fault".
I know, this is natural behaviour.
One way of getting around this is writing the module which has to be loaded by linux. I will consider this some time later.
For now, I want to come to some quick result and allow linux or gcc compiler to write to those memory areas of periphals. Is there a direct way to do so?
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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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Aug 22, 2010
This is my first post in these forums. I'm still quite new to Linux (using Mint 9) so please bear with my not-very-articulate question(s)When I boot up and open up a tty terminal I get a message saying "Memory corruption detected in low memory." I've done an extensive google search about the issue and it seems not uncommon. I ran a memtest with no errors returned, so I'm sure that there's nothing really wrong with the memory; apparently it's a bug in the kernel that's causing this.
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Jan 17, 2010
I found from command 'top' that 8GB memory are used. However, using command 'ps' with some options to grep the running processes and then summing up the memory used by the running processes are less than 2 GB. Where has the used memory gone ?
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Jan 8, 2011
I 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.
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May 4, 2010
I 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
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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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Apr 24, 2011
I am trying to install Ubuntu 10.10 from a USB flash memory stick. It works fine until around 95%, where I get the following warning/error:
[Code]....
I click OK and the installer seems to finish nicely, except the terminal throws several errors along these lines (see photo):
[Code]....
I tried also with 10.04 LTS, the difference being that the install warning appears two or three times instead of once. Some results from googling (Ubuntu Forums, Ubiquity bug) suggest unchecking the initial update options. I am going to try this but I'm not sure if I'll be able to get the boot loader right (there seemed to be problems with this).
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Jul 20, 2010
I'm running 10.04 on a machine with 512 MB of RAM and a 3.2Ghz processor. Without any programs open, memory usage is around 350 out of 500 MB, or, around 70% of total memory.
I was previously running 9.04, but upgraded to get the long term support. Although I don't have it installed now, and didn't write it down, I'm sure 9.04 used much less memory, and it certainly felt a lot faster when opening and using applications.
Is it normal for Ubuntu 10.04 to be using this much memory, and if so, what are some things I can do to reduce memory consumption?
Reading Wikipedia, it says Ubuntu only uses 128 MB of RAM.
By the way, here is a screenshot: [URL]
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Jun 14, 2010
Does anyone know why Ubuntu 8.04 consumes about 100MB more RAM at idle compared to 9.10?
Is this something to do with the Hardy Heron GUI, processes switched on/off, or a redesign?
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