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redhat 99.9% processing kernel problem

Discussion in 'General Discussion' started by wyatt12, Dec 18, 2003.

  1. wyatt12

    wyatt12 Member

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    After upgrading to latest redhat kernel.... my box is blowing up... I have 4 processes that show up as running 99.9% of the processing time, very often. mysql, httpd, exim, spamd.

    I assume I have a bad kernel, I used redhat update. Anyone else experiencing these problems?

    Wyatt
     
  2. blaze64

    blaze64 Well-Known Member

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    Yep, I am having the same issue. I am using the RH kernel as well (2.4.20-24.9).
     
  3. purplepaws

    purplepaws Well-Known Member

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    Seeing the same sort of issues on our RH9 boxes as well.
     
  4. Karateka

    Karateka Active Member

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    Well, the problem doesn't seem to be related to cpanel. I get the same effect on other boxes, but yes, it is a very annoying problem and started with the latest redhat kernel upgrade on redhat9 systems.
     
  5. netwrkr

    netwrkr Well-Known Member

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    Hi,


    Can you paste the output of 'uname -a' and briefly describe your server hardware i.e. dual xeon, xx gigs of ram etc?
     
  6. blaze64

    blaze64 Well-Known Member

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    Linux box12.XXXX.com 2.4.20-24.9 #1 Mon Dec 1 11:35:51 EST 2003 i686 i686 i386 GNU/Linux

    It seems that it is related to RH 9. Everyone else is running RH 9 (including myself).

    Did everyone elses box come stock with RH 9 or did you upgrade to RH 9 from RH 7.x?
     
  7. purplepaws

    purplepaws Well-Known Member

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    Linux hostname 2.4.23 #1 Thu Dec 4 13:28:49 EST 2003 i686 i686 i386 GNU/Linux

    Linux hostname 2.4.20-24.9 #1 Mon Dec 1 11:35:51 EST 2003 i686 i686 i386 GNU/Linux

    Both Redhat 9 fresh installs in the last few weeks.

    Not causing us major problems yet, but a little irritating. CPU use spikes up to 99.9% every minute or so.
     
  8. netwrkr

    netwrkr Well-Known Member

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    Are you running single or dual processor boxes? How much RAM is installed? Are the spikes to 99.9% transient in nature or does the process stay at 99.9% for a period of time (5 minutes or longer)?
     
  9. Higgins

    Higgins Well-Known Member

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    We have the same Problem. After the Kernel Upgrade nearly everything on the Server makes realy High Loads

    Restarting Proftpd brings the Box to a Load nearly 3

    When Looking in MySQL/CPU Usage in WHM nearly every Site on the Server shows a Load from 5-7

    Befor the Kernel Upgrade the Box had Performed very well with a average Load from 0,5-0,8 and 120 Users on it. Now we have a Load from 2-4

    This is realy ..... :( and i dont know what i can do here.
     
  10. anand

    anand Well-Known Member

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    If you would take my advise, move immediately to pureftpd. This is the same thing i noticed on 5 boxes of mine some time back (ard 6 months). Suddenly the load on all these boxes will go sky high and doing a top revealed that proftpd was taking huge resources and memory. Even ps -aux had tons of proftpd instances. I thought it was some kinda attack or something.

    I searched everywhere i found nothing to solve this. I then moved the servers to pureftpd and the probs solved immediately on all of them. The clone instances never happend on pureftpd. The load returned to normal.

    Try it, you don't loose anything, if it helps, stick to pureftpd.
     
  11. blaze64

    blaze64 Well-Known Member

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    As far as the overall load, I had the same problems. Before the kernel, a load of 0.00 - 0.50 with about 250 sites on the box. After the kernel upgrade, it was at 3.0 - 5.0.

    After hours and hours and hours... I recompiled apache about 4 times, (recompile...reboot, recompile, reboot) and I finally got the load down to 0.00-1.00 again. Maybe apache wasn't compiling correctly?? I KNOW it wasn't the simple fact that it was rebooted because that was done enough with some bad ram, it had to do with the recompiling of apache.

    But, I STILL have the 99.9% spikes for httpd, EXIM, MySQL.
     
  12. Website Rob

    Website Rob Well-Known Member

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    On the flip side, been 24 hrs now since upgrading from 2.4.20-19.9 to 2.4.20-24.9 (RH 9x) and no load spikes. Also just did an upgrade to WHM 8.5.4 cPanel 8.5.5-E27 (I only use Edge) and proftpd is upgraded to 1.2.9tls-5.

    One thing I noticed is that cppop always has to be restarted after a Cpanel update. Jumps right up to 99% and wont' go down -- without a restart. This has been going on for about a month now, with every upgrade of Edge. Will be fixed one day, I guess. :)
     
  13. cPanelNick

    cPanelNick Administrator
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    You should put a ticket in as you might have a lock file that needs to be removed. please email me the ticket # to nick@cpanel.net
     
  14. Website Rob

    Website Rob Well-Known Member

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    Appreciate the interest, Nick, but not that big of a deal -- to me anyway. I'm aware of the situation and takes no time to restart cppop. Besides, if something did lock a file, cause it sure wasn't me, maybe my setup is preventing what's happening to others. :)
     
  15. Myacen

    Myacen Well-Known Member

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    Website Rob we have the same problem with cppop I thought it was an error with enterprise myself.
     
  16. wyatt12

    wyatt12 Member

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    Hi,

    These problems started right after we updated kernel. We had already updated proftp to stop the proftp problems. We had so many problems with high loads and boxes locking up, we started using the previous kernel for the time being.

    Instead of using Redhat's update, can I just go and grab the latest stable from kernel.org and compile? Will this work on a redhat box?

    Has anyone gotten this to work yet? I would imagine this is a wide spread problem...

    Wyatt
     
  17. netwrkr

    netwrkr Well-Known Member

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    Yes. The only time my boxes use a RH kernel is when they are first installed. Upon first boot a new custom compiled kernel is put together that is specific to the server being built.

    I am not seeing -any- load problems with any services.

    uname -a
    Linux .securityminded.net 2.4.23-securityminded #1 SMP Sun Dec 7 16:29:31 EST 2003 i686 i686 i386 GNU/Linux

    uname -a
    Linux .securityminded.net 2.4.23-securityminded #1 SMP Wed Dec 10 17:07:47 EST 2003 i686 i686 i386 GNU/Linux
     
  18. odoisc

    odoisc Member

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    I to seem to have a problem like this. Box is only a few weeks old, and only been really in use since today.

    A 99% mysql load that comes back every few minutes
    and a httpd that changes from 25 tot 50% most of the times


    Its not really stopping down my server, but it doesnt look healthy either. Although sometimes it looks like it might just been giving wrong info and evertyhing could in fact be ok.


    But I dont find a real solution in this topic ? Is there a way to solve this or not ?
     
  19. netwrkr

    netwrkr Well-Known Member

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    Hi,

    Can you post some information such as CP version, OS etc?

    Thanks.
     
  20. odoisc

    odoisc Member

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    WHM 8.5.4 cPanel 8.5.4-R72
    RedHat 9 - WHM X v2.1.1

    this here ?
     
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