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  1. Moodle
  2. MDL-50390

Logs download (e.g. CSV) uses too much server memory

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Not a bug
    • Affects Version/s: 2.7.8, 2.8.6, 2.9
    • Fix Version/s: None
    • Component/s: Reports
    • Labels:
      None
    • Affected Branches:
      MOODLE_27_STABLE, MOODLE_28_STABLE, MOODLE_29_STABLE

      Description

      • Pick a course with plenty of users and a few months history
      • Set your php.ini memory_limit to something generous but sensible (I have 512M)
      • Go to the logs report for the course and select everything (works fine, hundreds of pages are expected - the course I had bother with had 1,700 pages)
      • Choose the download as CSV (or any other format) at the bottom of the page
      • Download quickly fails having consumed all the memory (can't allocate x bytes error)

      The code to achieve this seems surprisingly complicated for what it does but I can only assume that the report attempts to load the whole data structure into memory before passing it off to a library function for the actual download. This was never going to work due to the potential for large amounts of log data.

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                • Created:
                  Updated:
                  Resolved: