Ubuntu :: Memory Use Rather High With 9.10 - Compared To Other
Apr 5, 2010
Most of my many Linux installs boot up to a memory use of 170-190 MB with no open or running programs. But with Ubuntu 9.10 it shows; 305-310 MB and the top RAM use item is the; compiz.real, which I think is a display desktop effects application. I have the nvidia video card driver installed, and that nvidia X-Server configuration tool. Also I can not find where that compiz options is at, ( the display options in system, preferances does not open, and says to use my video card tool ).
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May 18, 2011
We have a 32bit Gui application created using C++. We ported the application from Solaris to Linux. Issue we are facing is the size of the library and executable is very large in LINUX compared to Solaris. Red Hat Enterprise Linux 5.4 is the Linux version we using. Please find a sample dynamic library created. We would like to know the following behavior of LINUX is normal or not. Consider we created two files test1.cc and test2.cc. Both having a single line of code.
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Jul 11, 2010
My problem seems to be very simple, it's high memory usage. I occasionally will use movie player to watch a few shows and I use firefox as well. My memory usage starts out real small about 500 mb but after using firefox lightly and movie player it jumps to almost 2 gigs and this is after they've been closed what gives? I've attached an image so you can see what I'm talking about.
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Apr 30, 2011
I just installed Kubuntu 11.04.
I ran VLC and it brought my PC to a halt.
I attached a picture of memory usage from htop.
Why do you think VLC is using so much system resources?
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Oct 18, 2010
I have a kernel module that I am trying to do a phys_to_virt() and then perform a memcpy to the returned virtual address. The problem that I'm having is that my module crashes during the memcpy when trying to do this on a physical address in high memory. Do I need to need to perform some kind a mapping operation on high memory address for this to work?
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Mar 12, 2011
I've installed my debian sid about one month ago (first xfce, next gnome) but noticed that it's kind of really slow. The upgrades take ages, launching (and using) firefox takes so much time,... In comparaison to my ubuntu, archlinux (on the same computer) or previous installation of debian there is clearly a problem somewhere.Today I tried to do a "top" sorted by mem usage : 3.5% xulrunner-stub, 2.1% dropbox, 1.4% aptitude (doing upgrade), 1.4% clementine,... nothing terriblebut still I've 2.7Gb or RAM used (more than 50%)
$ free -m
total used free shared buffers cached
Mem: 3967 26851282 0 79 1938
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Nov 11, 2009
I have a server running samba process and there are about 70 samba users connected at a time. The system has 4Gb of memory and it seems each samba process is utilizing only 3352Kb of memory.
When I run the command
pmap -d (pid of samba)
It gives as:
b7ffa000 4 rw-s- 0000000000000000 0fd:00003 messages.tdb
bfe46000 1768 rw--- 00000000bfe46000 000:00000 [ stack ]
ffffe000 4 r-x-- 0000000000000000 000:00000 [ anon ]
mapped: 33384K writeable/private: 3352K shared: 20504K
But when I run the top command, it results as below:
Tasks: 163 total, 1 running, 162 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.9% us, 4.9% sy, 0.0% ni, 93.3% id, 0.8% wa, 0.2% hi, 0.0% si
Mem: 3895444k total, 3163192k used, 732252k free, 352344k buffers
Swap: 2097144k total, 208k used, 2096936k free, 2487636k cached
Why could the system be utilizing such high memory? By the way, the server is not running other processes. The samba version running in it is 3.0.33-0.17.
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May 11, 2011
I upgraded from Fedora 13 to 14 over the network. Everything seems to have worked. The one problem after my install is that I have noticed that setroubleshootd consumes alot of memory.
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It doesn't take long for setroubleshootd to jump in memory usage. I can kill the process but it will start up again. I have tried disabling the service but it doesn't show up in /etc/init.d. # service setroubledshootd stop setroubledshootd: unrecognized service So I am not sure what I can do to resolve the issue with setroubleshootd besides killing it off every 15 minutes.
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Jul 14, 2010
In our database, when checking the memory used using top command, we are always seeing 32 GB RAM utilized. We have set the sga_max_size to 8gb and PGA to 3 gb. We have tried shutting down oracle db and then the memory went down to 24GB when checked using top command. After cold reboot of the DB server, it gone down to 1.5 GB.
But once the users are started using after end of day, the memory again gone back to 32 GB.
Top Command output (truncated)
======================
top - 15:18:27 up 5 days, 19:43, 1 user, load average: 0.55, 0.39, 0.32
Tasks: 599 total, 3 running, 596 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.5%us, 0.4%sy, 0.0%ni, 97.9%id, 0.1%wa, 0.0%hi, 0.1%si, 0.0%st Mem: 32949628k total, 32823336k used, 126292k free, 238808k buffers
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May 28, 2010
I have an Ubuntu server running in our small office. Among its many duties is report generation. It uses PHP and DOMPDF (a PHP library for converting HTML/CSS to PDFs for printing). PHP's default memory limit of 32MB is not even close to being enough to pull large amounts of data from the database and generate images/tables/PDFs with that data.
I increased the memory limit to 64MB and that is adequate for reports under 3 pages or so (varies based on table complexity, images, etc). If any user tries to generate a report longer than that, PHP just throws a "out of memory" error and doesn't make the report.
My question is: what are the possible consequences of increasing the memory limit yet again to 128MB or maybe even higher? The server isn't terribly powerful. It has 2GB RAM and 4GB swap space. I know that isn't much but this is a small office and at most I can only see two or three people trying to run reports at the same time. As for security, apache is currently only serving pages in the local network, but sometime within the next year I'll probably have it hosting a public website (currently using a hosting service). Is a high memory limit a potential security risk when exposed to the internet?
EDIT: Sorry, PHP's default memory limit is 16 not 32 as I said. Question still stands, however
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Jul 19, 2010
Basically 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?
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Apr 2, 2010
i am having a problem that i would call a bit "important" with my server. so, from last 3 weeks the used space of my hard disk (RAID I) started growing up. i have 2 x 1 tb HDD working on RAID I and i did not install anything those weeks. the space just started changing from 90 GB till 580 GB. now the situation is stable there but i think it's not normal.
the bandwidth usage is low (like 120 gb in 2 months) and i am running 6 counter strike gameservers, a forum, a very little website and some local stuffs... a friend of mine told me that my server could have been hacked but i am afraid it did... some useful informations: when i reboot the server the used space goes down again to ~100 GB and then it starts going up again. i cant really find where all those files are located:
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Oct 19, 2010
I recently upgraded to Ubuntu 10.10 and I am experiencing an ultra high memory usage of the gnome-settings-daemon of 2GB after suspend! Killing and restarting the daemon solves the issue. Anybody else with this behavior?
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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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Nov 22, 2010
I was browsing my folder with lots of images, after finished i close nautilus and i notice that my computer became slow, so i'll check it with system monitor and had found that nautilus are using almost 100mb of ram (opening 4 tabs). I'm not sure if this was normal or not because i try to reopen the same folder with pcmanfm and it only consumes less than 20mb of ram (opening 4 tabs).
here's the screenshot from system monitor .
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Jun 16, 2010
I have become a recent fan of linux and I want to install ubuntu on my acer aspire 5630 because vista runs terrible on it. Everything seems to work fine when I run it off the cd im just wondering if it will still work great when i actually install it. Is there any big difference between running the os off the cd compared to when you actually install it?
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May 7, 2010
I notice that the NVIDIA GPU on my Dell XPS M1330 gets much hotter under Lucid than with Karmic (or Windows).While the temperature monitor in the "nvidia x server settings" showed between 50 - 60 degrees under Karmic I get readings above 70 degrees with Lucid and the fan is permanently on. I have no GPU intensive applications running.
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Nov 8, 2009
I have some questions like in my other thread about vmware server vs. vmware workstation.
This one is how does KVM compare to vmware. I've been reading how Red Hat has been embracing/using KVM so how is KVM compared to vmware. Does KVM have the same performance as vmware, or better? USB support, any issues with it like VirtualBox? Any issues running both vmaware and KVM at the same time as I compare/contrast Finally are there tools to convert a vmdk to what ever KVM uses
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Dec 29, 2010
I 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?
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Feb 16, 2009
The system's volume is way too low compared to windows vista set up on the same computer. The master volume (at the top right corner) and the player's volume is set to full and the speaker's volume is almost full. even the sound is just ok, not loud. Why can such a thing happen on fedora 10?
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Sep 27, 2009
I thought java was opensourced, yet the Cisco ASDM (which is java based) is completely unuseable when using openjava. When I use the version from java.com, everything works as expected, including the browser plugin.
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Dec 24, 2009
I understand that md5sum had some faults where it would get the same checksum on 2 different files.What exactly are the benefits of sha256sum compared to sha1sum?
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Mar 31, 2010
I was a user of openSUSE 10.3. I used to get a decent speed in BitTorrent (using KTorrent 2.2.1) there, since I had earlier used Windows and the speed wasn't as good, even in Windows 7. Recently, I installed openSUSE 11.2 and found that I wasn't getting the good speeds in KTorrent. The overall performance was a fraction of what I used to get in the older Linux installation.
I decided to verify whether my suspicions were justified by again reinstalling openSUSE 10.3. When I did this, I was again able to get the great performance I used to get always with openSUSE 10.3 running KTorrent 2.2.1 I don't know what causes this, but I know that this sad thing really has happened. A newer version is actually not worth it! I hope my voice reaches the openSUSE developers and such bad incidences don't occur anymore.
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Feb 18, 2011
I have installed Wubi (Ubuntu 10.10) recently. It takes more time to boot than Windows. But my main concern is that my browsing speed is much slower compared to that on Windows 7. How can this be resolved?
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Mar 20, 2016
With all the talk about disk encryption for Apple devices, I wanted to ask about how full disk encryption compares between debian linux and mac OS X. Is the code for debian linux fully available for people to inspect for flaws or backdoors? Apparently although part of the encryption code is available for OS X the full code for Filevault 2 is not public. What are the advantages and disadvantages of each method of encryption for each operating system?
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Sep 9, 2010
I am using linux fedora 13. Speed Internet is very low compared to Windows xp.I'm using ADSL. Especially when I'm using the FTP for download. my browser is firefox . my download manager is uget . I tested Almost all download manager . No difference.
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Aug 8, 2010
I've noticed since switching from Kubuntu 10.04 to openSUSE 11.3 on my laptop that the Adobe Flash plugin seems much more prone to crash and fullscreen video playback (e.g. Hulu) performs terribly. I can't figure out what's different between the distros. In both cases, I'm using a 64-bit OS, Firefox and KDE, and the proprietary NVIDIA driver. Anyone know what might be happening, or more importantly, how to improve Flash stability and performance on 64-bit openSUSE?
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Feb 2, 2011
first of all im new to OpenSuse i have been using different distros since early 90's if theres one i havent tried i would be very surprised anyway im very picky when it comes to sound and picture maybe its the fact that im a developer and also art director anyhoo i got tired of my HTPC ( windows ) i thought linux has to be able to do it just as well i mean i only use it for movies and music but was surprised to see how video works in linux picture is somewhat ok compared to Windows but movement is another story even vsync off it looks like a old VHS tape when it should be DVD. Cam-panning is even worse. How is this and can it be fixed?
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Feb 2, 2010
I was wondering if torrents and torrent programs don't work as well in Linux compared to Windows.I have used them in the past but all of a sudden, nothing would work in my Kubuntu install. Absolutely nothing would start. I tried different configurations, settings, but nothing. I left it alone and rebooted and started up XP. I installed Azureus and I didn't do nothing else.I didn't even configure Azureus and left the router settings.I was able to start a download.I've used KTorrent (default) and Azureus before.
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Jan 28, 2010
Debian lenny, old install (I've upgraded to lenny when it was just about to become the stable release), versus windows 7, fresh install.Comparing browsers speeds with numion.com/Stopwatch.html, I had results such as:Iceweasel (firefox) on linux: from 9.154 seconds to 21:860 seconds (the same webpage, reloaded)Firefox on windows: 4.32 seconds - and never much slower than thatThe fastest browser on linux was Opera, ranging from 8.562 to 5.503 secs to load the same page, but even internet explorer beat/match it with its timing of about five seconds.
I have not other browsers on windows; on linux there is aroraonqueror (KDE3), kazehakase, chrome, and dillo, besides text browsers. I didn't test on dillo; Kazehakase and chrome were the only ones which had nearly decent results, but still very bad, 11 to 13 seconds for chrome, and 21 for kazehakase. Konqueror just seemed to never finish to load the page, I gave up when it was still loading somethingfter nutes and 5 seconds.'ve emptied the cache every time I would test, and I was running almost only the browsers and not much else. Whatever comes by default on windows, and on linux, I was on openbox, with nothing much going on I guess, I think the most memory consuming processthe time, besides xorg and the browsers themselves, was dictd.
I've researched a little bit about, but not enough to make a list of possible things to change in order to improve the speed on linux. Most of the time there are people just agreeing that on windows the rendering is faster, and other people saying that with them is the opposite, with some minor variations like people saying that linux is faster for plain downloads while windows is faster for web browsing due to better graphics.
(by the way; I haven't installed any graphic card driver on windows, which is still running on 1024x768, while linux runs on 1280x1024, with the "nv" generic driver, without fancy options, not supported by my old card) The closest to a suggestion of possible solutions was someone saying tha compilation may affect performance, I guess it was both about kernel compilation, and the web browsers themselves.I'll google a bit more about how to "compile for speed", both kernels and programs (maybe the x server
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