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CloudLinux load and crashing

Discussion in 'CloudLinux' started by monarobase, Sep 5, 2012.

  1. monarobase

    monarobase Well-Known Member

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    Did you try contacting CloudLinux support ? We have had no crashes caused by cloudlinux which if anything has helped decrease the server load !
     
  2. voshka

    voshka Active Member

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    re: a feature to secure against symlink attacks vulnerabilities in apache

    I did
    there was about 2 day ticketing and too many reply
    they attempted to fix it but finally their final answer was that I have too much mysql queries that crash the server
    but I reverted every things back to Centos and every things fixed
    our server is highly customized
    we have 240Gig mushkin ssd and it coudl handle a load of 800 without being down that one the other of our server is so
    but this server would go down with the load of 50

    Thanks
     
  3. monarobase

    monarobase Well-Known Member

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    re: a feature to secure against symlink attacks vulnerabilities in apache

    If you are talking about the server load in the top command, then I'm not sure I've ever seen a load of 800 before… (I mean not able to access a server with this sort of load…) such a load means that there is a huge bottleneck somewhere… !

    Maybe you could add some more ram or configure mysql to use more memory thus using the hard drives less…

    - - - Updated - - -

    +1 for the secure links patch for apache for people who don't use CloudLinux :)

    If I'm not mistaken Cloudlinux will soon be doing this on a kernel level but are currently doing this in their apache module, so cPanel should be able to either create a module to do this or just patch all vulnerable apache versions.
     
    #3 monarobase, Sep 6, 2012
    Last edited: Sep 6, 2012
  4. voshka

    voshka Active Member

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    Re: a feature to secure against symlink attacks vulnerabilities in apache

    Hi
    the server I used for patching the kernel with cloud linux at peak time had a load of 10 some times 20
    all the requests are normal and it is highly customized

    I mentioned that I have another serve with the same configureation that even can handle the load of 800 and all the websites can be able to run and start so fast

    but by having cloud linux the server load would go so high and unreachable
    maybe their kernel is not compatible with such custom server that uses isolated SSD just for the Operation System and mysql
    but what i figured out that the main Centos kernel is highis more stable than the patched one in term of security
    I even patched the server kernel with ASL and results wre, unstablity, unability to mount other hard drives

    I also entitle you do not belive that a server can handle such high load
    It is the Power of a SSD and apache and mysql configuration and optimization

    Thanks
     
  5. voshka

    voshka Active Member

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    Re: a feature to secure against symlink attacks vulnerabilities in apache

    the current apache requests
    and
    also attached the htop
    every thing is also normal


    Apache server status for server.moviearena.org

    Server Version: Apache/2.2.22 (Unix) mod_ssl/2.2.22 OpenSSL/1.0.0-fips mod_bwlimited/1.4 mod_fcgid/2.3.6
    Server Built: Sep 6 2012 06:21:22

    Current Time: Thursday, 06-Sep-2012 13:55:32 EDT
    Restart Time: Thursday, 06-Sep-2012 06:47:40 EDT
    Parent Server Generation: 2
    Server uptime: 7 hours 7 minutes 52 seconds
    Total accesses: 1381670 - Total Traffic: 17988.4 GB
    CPU Usage: u289.98 s520.37 cu0 cs0 - 3.16% CPU load
    53.8 requests/sec - 0.7 GB/second - 13.3 MB/request
    6758 requests currently being processed, 639 idle workers
     

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  6. monarobase

    monarobase Well-Known Member

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    We use SSD's for our operating system and mysql and normal hard drives for the rest but we never get that sort of load we rarely go over a load of half of our CPUs.

    A load of 1 means that you have a wait of 1CPU cycle, a load of 900 means you have a wait of 900 CPU cycles, there is defenitly something that is queueing up…
     
  7. iseletsk

    iseletsk Well-Known Member

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    A load of 900 means that you have 900 processes (or threads) waiting on CPU or disk -- so yes, big problem
     
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