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  1. Moodle
  2. MDL-9838

Large number of quiz attempts (effectively) break backup

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 1.6.5
    • Fix Version/s: None
    • Component/s: Backup, Quiz
    • Labels:
      None
    • Affected Branches:
      MOODLE_16_STABLE

      Description

      I've been unable to verify if this problem persists in newer versions that 1.6.5 - but I should be able to soon

      If a course has a large (but not ridiculous) number of quiz attempts (order of 1000 for a quiz with about 25 questions) backup and/or restore is severely compromised. It seems that building the XML for those attempts burns up crazy amounts of memory (we went up to half a gig before giving up). A similar problem is exhibited trying to restore the file - this has been verified as a problem in 1.8 STABLE.

      IMHO, backup and restore shouldn't ever use that amount of memory, although I appreciate the solution will be complex.

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                  • Created:
                    Updated:
                    Resolved: