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  1. Moodle
  2. MDL-41222

Course cache is rebuild unnecessarily

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 2.4.5, 2.5.1
    • Fix Version/s: 2.4.6, 2.5.2
    • Component/s: Course
    • Labels:
    • Testing Instructions:
      Hide

      Prerequisites for both tests:

      1. Make sure you have several courses with activities in them and non-empty summary.
      2. Enable activity names filter (should be enabled by default)
      3. Set frontpage to display list of courses

      Test 1. Regressions:

      1. Enrol student in multiple courses
      2. View frontpage, /my/ page, individual courses, make sure there are no glitches.
      3. As teacher make changes to the course, view all courses pages again.

      Test 2. Performance:

      Significant performance improvement is noticeable on 2.5 and master since activity names filter was acting differently on 2.4

      1. Wait for 2 minutes (filters cache lifetime)
      2. Open the frontpage with the list of courses.
      3. Look at performance information, should be significantly less DB queries after the patch than before
      Show
      Prerequisites for both tests: Make sure you have several courses with activities in them and non-empty summary. Enable activity names filter (should be enabled by default) Set frontpage to display list of courses Test 1. Regressions: Enrol student in multiple courses View frontpage, /my/ page, individual courses, make sure there are no glitches. As teacher make changes to the course, view all courses pages again. Test 2. Performance: Significant performance improvement is noticeable on 2.5 and master since activity names filter was acting differently on 2.4 Wait for 2 minutes (filters cache lifetime) Open the frontpage with the list of courses. Look at performance information, should be significantly less DB queries after the patch than before
    • Affected Branches:
      MOODLE_24_STABLE, MOODLE_25_STABLE
    • Fixed Branches:
      MOODLE_24_STABLE, MOODLE_25_STABLE
    • Pull from Repository:
    • Pull Master Branch:
      wip-MDL-41222-master
    • Pull Master Diff URL:

      Description

      If frontpage shows the list of courses and they have summaries, displaying the course summaries calls format_text which (if filters are not cached) calls acitivitynames filter which calls get_fast_modinfo($courseid).

      In this case course cache gets rebuilt unnecessarily

        Attachments

          Issue Links

          blocks

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. MDL-34397 Develop course structure caching

          • Critical - Crashes server, loss of data, severe memory leak
          • Closed

            Activity

              People

              Assignee:
              marina Marina Glancy
              Reporter:
              marina Marina Glancy
              Peer reviewer:
              Andrew Lyons Andrew Lyons
              Integrator:
              Dan Poltawski Dan Poltawski
              Tester:
              Sam Hemelryk Sam Hemelryk
              Participants:
              Component watchers:
              Amaia Anabitarte, Carlos Escobedo, Ferran Recio, Ilya Tregubov, Sara Arjona (@sarjona)
              Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:
                Fix Release Date:
                9/Sep/13