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  • How do I reduce RAM usage on my server?

    - by Abs
    I have recently launched a site that is very popular but I am having trouble with scalability. My site makes heavy use of FFmpeg and at peak times RAM usage hits the 2 GB point quickly and the swap file starts getting used. CPU usage starts rising too. Users complain that the site is slow. They say this because all FFmpeg instances run very slow because of the number running at the same time. Users make use of FFmpeg on my server in real time. Is there anything I can consider or do to ease down the usage of the server and RAM just shooting up? Maybe there is something better than FFmpeg (!). Is the only solution "throwing some cash" at a more powerful server? I have given little information, please ask for more, so this problem can be solved.

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  • High system cpu load (%sys), system locks

    - by Mark
    For the last two weeks we are having intermittent severe spikes in system cpu usage (shown as %sys), which last for maybe half a minute, locking most processes, including ssh. I've been trying to figure this out, but atop doesn't show anything relevant (system usage for processes it shows is insignificant), spikes are intermittent and I could not reproduce the spike using any workload for the web application this webserver hosts. If you have any ideas on how to debug high %sys and (sometimes) %si CPU usage, please share them. System specs (don't know if any of this is relevant): Dedicated server, CentOS 6, core i7 950, consistent 4 to 8 GB RAM free at any time, hard drives are in RAID-1. Additional info: dmesg output doesn't change between spikes /var/log/messages doesn't change between spikes Here is cat /proc/vmstat Here is output of mpstat 1 during a typical spike Add 07.11.11: looks like simple reboot restored system state, and we might never know what caused the disturbance in first place.

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  • Ubuntu Wired network(ethernet does not work)

    - by user36777
    It was working just fine, until the other day I yanked it out. The wireless works just fine on the same router. If I login to a windows 7 instance on this dual boot laptop then the ehternet works just fine. So it's not a hardware, cable or router issue. The card even gets an ip, but I can't connect to the internet. Here are the details from route, iptables, ifconfig, ping etc. Any ideas? I have been struggling with this for day, none seems to have an answer. http://pastie.org/954816

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  • putty 0.61 : why do I see "Access Denied" message after I enter my login id?

    - by anjanbacchu
    I use putty to login to my RHEL 5.3 server. I'm prompted to enter my login as "login as " and I enter my login Id. as soon as I press ENTER, I see a "Access Denied" message following which I'm prompted with password. I successfully enter password and I'm through -- no problems. I tried the same with putty 0.60(as opposed to above putty 0.61) but in this version, I don't get any "access denied" error. What should I make of this ? Is putty 0.61 version buggy ? P.S : If I login using ssh.exe(from cygwin), then I'm fine -- I don't get any "access denied" errors. Thank you,

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  • Ubuntu stops auto-mounting flash drive

    - by Brian
    It seems that after being up for a few days, my Ubuntu system refuses to auto-mount hot-plugged USB disks (i.e. flash drives). The output from dmesg shows that the kernel recognizes the device correctly. The only solution I'm aware of at the moment is to reboot (logging out may work as well, but the impact is the same since I have a bunch of stuff open and it takes a few minutes to get everything situated after startup/login). I thought gvfs-fuse-daemon was the thing responsible for managing filesystems in userspace, but killing and restarting that doesn't help. Any other ideas?

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  • Oracle error when logging into database

    - by Bryan
    When I try to log into my db with a specific user I get this message. Below is from the alert log. I can login as system just fine. Anyone know how to figure out what is causing this? Thanks in advance for the help. ----- Error Stack Dump ----- ORA-00604: error occurred at recursive SQL level 1 ORA-01438: value larger than specified precision allowed for this column ORA-06512: at line 2 Oracle 10g OEL 5.5

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  • Disaster - partitions lost, data seemingly alive, how to recover?

    - by a2h
    I've used TestDisk and it's written my old partition structure of a ~20GiB partition for Vista, ~25GiB partition for 7 (but it now shows up as unallocated) and a ~400GiB partition for documents. What it's meant to be is a 30GiB partition for 7, some unallocated space, and a ~400GiB partition for documents. So currently, I have access to all my documents, but not any of the programs I've installed on C:, or AppData, because my boot partition is now supposedly a 20GB vista partition. I've tried using my Windows 7 install disc's repair function, but that did nothing beyond wasting about 10 minutes of my time. I'm currently posting from an Ubuntu live CD. Any help?

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  • Formatting LVM partition with HFS+

    - by Pyetras
    I've already tried fsck.hfsplus from hfsprogs, which doesn't do anything at all, and gparted (doesn't work with LVM). Are there any other ways to do that? If all else fails I have OSX install DVD, but I'm not sure if its installer would see a LVM partition (and running it just to check that would be quite troublesome, as I don't have a DVD drive ATM).

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  • PHP5.3 FastCGI doesn't use global config's values

    - by mega.venik
    There's a Centos6.3 system. Apache 2.2.15 + mod_fcgid + PHP 5.3.3 There's a problem with date.timezone value. It's mentioned in the global /etc/php.ini like this: date.timezone = "Europe/Moscow" And doesn't mentioned in user's local php.ini. As a result, I'm getting lot's of warnings like: Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead in ... Including the date.timezone parameter into the user's php.ini solves the problem, but I don't think, that it's the best solution. Maybe someone have faced this problem and can give an advice? Thanks! P.S. Creating /etc/php.d/timezone.ini with the timezone info aslo does nothing:(

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  • Can't decide on a new distro

    - by Alex W
    I've had Ubuntu (9.10) on my netbook in the past and I really liked it. I'm currently running Fedora and feeling like I should "change it up" again. I've played around with Ubuntu 10.04 Lucid a little, and so far I'm very impressed. I've always wanted to try Arch, but I'm worried I won't have the driver support I need for all the non-standard hardware in a netbook. Does anybody have a suggestion for a new distro to try? I'm preferably looking for something feature-rich over light-weight, and something that I can have up and running with a minimum of configuration (at least partially working). Thanks!

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  • Le noyau Linux 3.3 disponible : intégration du code d'Android, améliorations réseaux, Btrfs et support d'une nouvelle architecture

    Le noyau Linux 3.3 disponible : intégration du code d'Android améliorations réseaux, Btrfs et support d'une nouvelle architecture Linus Torvalds vient d'annoncer la disponibilité de la version 3.3 du noyau Linux. Au menu des nouveautés, on notera essentiellement la réintégration des portions de code du noyau d'Android . Pour rappel, en 2009, les pilotes d'Android avaient été exclus du noyau parce qu'ils n'étaient pas suffisamment maintenus. L'intégration d'Android permettra aux développeurs d'utiliser le noyau Linux pour faire fonctionner un système Android, développer un pilote pour les deux et réduira les couts de maintenance des correctifs indépendants d'une...

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  • AWSTATS - manual update error (permissions)

    - by Lewis
    Error: Couldn't open file "/var/www/awstats/awstats032014.site.net.tmp.9198" for write: Permission denied Setup ('/etc/awstats/awstats.site.net.conf' file, web server or permissions) may be wrong. Check config file, permissions and AWStats documentation (in 'docs' directory). I get this error when manual trying to update awstats (via the browser link). I have set the folder permissions of /var/www/awstats/ to 775 and still get the error. If I create a new file on that folder the default permission setting set the permissions to 774 which should work.

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  • Why doesn't my cron.d per minute job run?

    - by Travis Griggs
    I have thrown a bunch of darts trying to get a python script of mine to execute every minute. So I thought I'd simplify it to just do the "simplest thing that could could possibly work" once per minute (I'm running debian/testing). I created a single line file in /etc/cron.d/perminute: * * * * * /bin/touch /home/me/ding_dong It's owned by root, and executable (not sure if either of those matter). And then I did: sudo service cron reload And then sit back and start running ls -ltr again and again in my home directory (/home/me). But my ding_dong file never shows up. I know if I do a sudo /bin/touch /home/me/ding_dong, it shows up right away. Obviously missing something stupid here.

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  • Proper way to configure ~/.Xsession with a standalone window manager to gracefully end a session

    - by cYrus
    I'm using xdm and my ~/.Xsession looks like this: # <initialization stuff here> exec openbox It works, but I've noticed that when I log out Openbox doesn't gracefully kill all the applications. In particular Google Chrome complains about that. How can I make sure to wait for all processes to exit (just like others configurations: Gnome, KDE, Windows ...)? The only (ugly) solution that I've found involves sleep and kill into ~/.Xsession.

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  • What is the easiest way to make a backup of an entire hard disk

    - by Solignis
    Hi there, I got myself a dell laptop from the local computer store. Its a used machine with Windows Vista Home Basic on it. I want to load Ubuntu Desktop 10.10 though so I can do perl development. BUT I want to keep a copy of the entire harddrive with the dell utility partition and Windows Vista in case I want to go back. I was thinking I could image the drive but I not sure what to use, I don't have Ghost or anything, Someone had told me about Clonezilla. Would that work for me? Is it hard to use? Also I want to burn the data to a DVD or something more storable than a harddisk.

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  • What is the easiest way to make a backup of an entire hard disk

    - by Solignis
    Hi there, I got myself a dell laptop from the local computer store. Its a used machine with Windows Vista Home Basic on it. I want to load Ubuntu Desktop 10.10 though so I can do perl development. BUT I want to keep a copy of the entire harddrive with the dell utility partition and Windows Vista in case I want to go back. I was thinking I could image the drive but I not sure what to use, I don't have Ghost or anything, Someone had told me about Clonezilla. Would that work for me? Is it hard to use? Also I want to burn the data to a DVD or something more storable than a harddisk.

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  • what are the components you can install on RHEL?

    - by user16654
    I just got a question from a customer(actually from a customer to my manager then to me) and he is asking the following question: What are the components that were installed with RHEL? It may sound like a silly question but to me it sounds vague. The main thing I am thinking about now is during install you can select three components: webserver software development and virtualisation. Could they be asking fro something else?

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  • 2.6.9 Kernel on virtual server (non upgradable) - any expected problems?

    - by chris_l
    Hi, I'm considering to rent a virtual server (for me personally). The product I'm currently looking at offers IMO fair pricing, very good hardware etc. The only problem is, that I won't be able to do an upgrade to a newer kernel than 2.6.9 (running Debian Etch). Also, I can't install my own kernel modules. (The server runs with Virtuozzo, so as far as I understand it, it just does some chroot instead of a real virtualization (?)) I want to run GlassFish, Postgres, Subversion, Trac and maybe some other things on it. It will also have to employ a firewall, and provide OpenSSL for https. Ideally, it would also be able to do AIO (asynchronous IO), which could speed up some server I/O. Should I expect problems with that old kernel version, in conjunction with the software I want to install (I'd like to use current versions of the software)? One thing I already found out, is that you can't do everything with iptables, since some kernel modules are missing/things are not build into the kernel. GlassFish v3 appears to run fine at first glance. I was able to test the server for a few hours. Installing my whole setup wasn't feasible in that time, but what I can say is, that it's amazingly fast for an entry-level vserver, especially hard disk and network performance (averaging at ca. 400MBit/s). So if the kernel won't be a problem, I'd really like to take it. Thanks, Chris PS Exact kernel version: 2.6.9-023stab051.3-smp

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  • Kernel compiling with -j2+ parameter ends prematurely with no error message or output bzImage

    - by Minix
    I've noticed quite a while ago that compiling a kernel with the parameter -j set to 1 or more doesn't produce a bzImage. Instead, it ends prematurely without any advice. I have reproduced the same behavior in both my netbook and home server. As far as I'm aware, the point where the compilation stops is random - Compiling twice with the same parameters will probably stop at different files. However, when I run make with no -j* parameter the compilation ends just fine and outputs a working bzImage. Both machines run Intel Atom (N270 on the netbook and 330 on the server) and I've compiled for these processors. If I recall correctly, I've tried compiling both with Atom and with generic x86_64 options. The kernel version I'm building is 2.6.34.1 I've always compiled normally with those options in my Core2Duo and Pentium Dual Core machines. Has anyone experienced this issue? Any ideas why does this happens? Is there a fix or workaround?

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