Major I think the diff makes the problem clear.
Index: lib/grade/grade_item.php
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@@ -871,7 +871,7 @@
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* @return object Grade_category
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*/
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function load_item_category() {
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- if (empty($this->category->id)) {
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+ if (empty($this->item_category->id)) {
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$this->item_category = $this->get_item_category();
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}
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return $this->item_category;
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This was causing one DB query per category, per student, when showing the grader report, which is very, very bad.
Andy, adding you as QA assignee, because I believe you are Mr Gradebook these days.
- has been marked as being related by
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MDL-22110 Check the gradebook for additional O(n) queries
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- Closed
-