Copying big files = high server load?

Discussion in 'Server Operation' started by edge, Apr 27, 2007.

  1. edge

    edge Active Member Moderator

    When copying files (4GB iso's) on one of my servers from one directory to an other, the server load average shown by the command top gets really high: (server load: 11.96, 11.20, 5.87). The rest shown by "top" looks okay.

    Anyone here who might know what could cause this high load?
  2. Hans

    Hans Moderator ISPConfig Developer

    The server load represents the number of processes waiting to access the CPU.
    So if you copy huge files and this process has a high priority on your server, other processes have to wait. This is why the server load increases.
  3. edge

    edge Active Member Moderator

    Thank you Hans. I understand the "processes waiting to access the CPU" part.

    But why with copying big files? It's not that I'm scanning the file.. It's just a simple copy the file from A to B.
    Does copy take that many processes┬┐
  4. Hans

    Hans Moderator ISPConfig Developer

    Copying huge files and making backups will normally cause a higher load on most servers. As far as i know the server load is to do with the CPU, not RAM.
    When huge files are being copied, it has to pass the CPU so...

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