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Find cause of high load

Discussion in 'General Discussion' started by RetiredAF, Mar 19, 2019.

  1. RetiredAF

    RetiredAF Member

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    On a few occasions we have experienced an huge and brief increase in load on our server (example follows). We'd like to find out what is causing this. If something would just run top and record the results when the load went above a certain level that might be a start. Anybody know how we might do that.

    10:00:01 PM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15
    ...

    11:30:01 PM 10 458 0.53 0.65 0.69
    11:40:01 PM 10 458 0.48 0.60 0.63
    11:50:40 PM 0 779 172.29 98.67 41.33
     
    #1 RetiredAF, Mar 19, 2019
  2. GOT

    GOT Get Proactive! PartnerNOC

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    The best thing to do would be to get alerted when load is high so you can log in and take a look, or better yet leave top running on the server for a while so you don't have to bother logging in.

    CSF/LFD has a high load alert it can send out when it sees load is above a certain point.
     
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    #2 GOT, Mar 19, 2019
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  3. RetiredAF

    RetiredAF Member

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    Thanks but so far this has only occurred at night when we are in bed so we were look for someway to automate this.
     
    #3 RetiredAF, Mar 19, 2019
  4. GOT

    GOT Get Proactive! PartnerNOC

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    I'm afraid that is not something we have done before as we have detailed monitoring systems that take care of that kind of thing for us. The command to dump the output of top to a file is

    top -b -n 1 > top.txt

    But you'd have to write a bash script that checked load and then ran that command to dump the output for you. I don't have a ready made solution for that though.
     
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    #4 GOT, Mar 19, 2019
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  5. RetiredAF

    RetiredAF Member

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    Thanks again. Actually your mention of CSF/LFD got me looking in that direction and I think this might be what I was looking for.
    webhostpython.com/billing/knowledgebase.php?action=displayarticle&id=66
     
    #5 RetiredAF, Mar 19, 2019
    Last edited by a moderator: Mar 19, 2019
  6. cPanelLauren

    cPanelLauren Forums Analyst II Staff Member

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    #6 cPanelLauren, Mar 20, 2019
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