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Harddisk suddenly fills up with hundreds of GB of data until it's full

Discussion in 'General Discussion' started by Ebridge, May 3, 2012.

  1. Ebridge

    Ebridge Member

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    Last weeks I had the following happening on our server, a couple of times:
    • suddenly something starts occupying disk space on the disk
    • this continues until the harddisk is full (within minutes, > 1GB/sec!)
    • at that point, the system becomes fully unusable (system load > 120)
    • after a while (about 30 minutes), the harddisk starts freeing up, at the same rate (>1GB/sec)

    Because of the high system loads it's almost impossible to run any commands, but at the worst moment, df -h shows:
    So it seems to me that it's not the tmp disk causing the problems.

    The high system load at these moments seems to be caused by httpd, but I'm not sure it's also responsible for the occupation of disk space.
    The increase/decrease of file space occupation is bigger than the fysical speed of the harddisk, so I'm assuming something is allocating the disk space.

    Any ideas on how to troubleshoot this problem?

    Kind regards
     
  2. nospa

    nospa Well-Known Member

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    Try to locate core.XXXXXX files, for example:

    #updatedb
    #locate core.

    This could be because of core dumps.
     
  3. Ebridge

    Ebridge Member

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    Is this something I should run at the moment the problems occur? Because right now, no "core.<digits>" files can be found.
     
  4. ruzbehraja

    ruzbehraja Well-Known Member

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    It may be a failling HDD. I would contact the Data Center and ask them to investigate too.

    The indication in WHM maybe wrong.

    What is it getting filled up with? Are you able to see / delete the files?

    Does this happen at regular intervals or is it random?
     
  5. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    Can you check if you have /root/.cpanel/comet on the server when it starts filling up and what size that folder happens to be?
     
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