Ubuntu :: 10.04 Using Too Much Memory?
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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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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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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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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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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Jan 7, 2010
I have 6gb Ram. Bios is recognizing all of it. Ubuntu 9.10 i368 is only recognizing 2.5 of it. I am new to linux and have no idea what the problem might be. I have run hardinfo and it only sees 2 gb as well.
My specs:
NVIDIA 680i
intel core 2 quad extreme
6 gb corsair 800mhs (2x1 and 2x2)
Geforce 8800gts 320mb sli'ed with a 9800 with 1gb
Running Ubuntu 9.10 i368
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Apr 29, 2010
I want to set a limit on the available RAM in my Linux machine, it currently has 4GB of RAM, and in order to perform some experiments I need the system to recognize and use only 1GB. I don't want to limit the amount of memory to one particular process (like with ulimit), but to the whole system. The OS in Ubuntu 9.10. Somewhere a long time ago (for Fedora) I read about editing grub, so that at boot time the limit is set, it might be something along those lines, but not really sure.
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Apr 30, 2010
Few months ago I downloaded a Turnkey virtual appliance with Wordpress pre-installed. I used this as a VM on my laptop and configured it. Then when everything looked good, I transfered it to my hosting provider (which is the company I work for) and they put the VM on ESX and connected it to the internet.Now I'm running into the issue that sometimes quite often and sometimes not for a week or so, the VM will hang.
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May 11, 2010
Is this normal? I check system monitor and the top most is xorg followed by compiz. When I first started with 10.04 few days ago it was around 300-500MB.
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May 16, 2010
i just recently installed ubuntu 10.04 onto my laptop. its running as a dual boot. i only allocated about 10gb of memory and have already run out. is it possible to allocate more memory afterwards
and another bug that i am having is my shift key is not functioning properly. if anyone happens to know this issue too. so i can't do exclamations of periods, capitalizations, etc... how would you remap your keyboard
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May 30, 2010
I install Ubuntu Server Lucid , Lamp 5200+ DualCore , 2GBmem etc . + Install Gnome Interface not all only strict necessary! On top kill almost process! It use 90% memory On Desktop Edition works fine all on Server normally whiteout X11 must be work fastest - here is lower !(I install few times is not bad installation)
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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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Jun 18, 2010
I am new to ubuntu i have installed ubuntu 10.04 through windows , while installing i selected size as 4 gb, but now after updating the ubuntu i am getting a warning as low disk space, how can i increase the memory where ubuntu is installed.
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Jul 16, 2010
I put together a p4 that has 3 slots for ddr memory and the specs say maximum memory is 2 G at 400 Mhz or 3 G at 333 Mhz. Now, I assume this means that if you install a third memory stick, it will run at 333 Mhz. Is this right? Which would be better out of curiosity?
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Sep 14, 2010
how much memory a ubuntu machine use? I use the 'top' to query,about 1.5G was used, 500M free. surprise! System monitor show that only 400M memory are used, which one was right??
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