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  1. Moodle
  2. MDL-50773

Poor gradebook performance on first visit after upgrading to 2.9.1 on large sites

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    • Affected Branches:
      MOODLE_29_STABLE

      Description

      When we upgraded moodle.org to 2.9.1, when a teacher visits their gradebook for the first time the page is incredibly expensive to compute.

      URL	/grade/report/grader/index.php
      Date	7 July 2015, 11:22
      Execution time	172035.121 ms
      CPU time	97441.265 ms
      Function calls	50921045
      Memory used	19104 KB
      

      Attached xhprof profiling data - It looks like its doing 183,000 database queries.

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                  Updated: