by Eduardo Miranda.
Junto con saludar,
Quería comentar respecto a un problema que me apareció en esta nueva versión moodle 2.8, cada vez que los profesores acceden al historial de calificaciones la CPU de mi servidor de base de datos se va al 100% de uso, la query que se esta ejecutando es la siguiente:
MySQL mdl_grade_grades_history select
SELECT ggh.id, ggh.timemodified, ggh.itemid, ggh.userid, ggh.finalgrade, ggh.usermodified,
ggh.source, ggh.overridden, ggh.locked, ggh.excluded, ggh.feedback, ggh.feedbackformat,
gi.itemtype, gi.itemmodule, gi.iteminstance, gi.itemnumber, u.idnumber, u.email, u.firstnamephonetic,u.lastnamephonetic,u.middlename,u.alternatename,u.firstname,u.lastname, ug.firstnamephonetic AS graderfirstnamephonetic,ug.lastnamephonetic AS graderlastnamephonetic,ug.middlename...More...
SELECT ggh.id, ggh.timemodified, ggh.itemid, ggh.userid, ggh.finalgrade, ggh.usermodified,
ggh.source, ggh.overridden, ggh.locked, ggh.excluded, ggh.feedback, ggh.feedbackformat,
gi.itemtype, gi.itemmodule, gi.iteminstance, gi.itemnumber, u.idnumber, u.email, u.firstnamephonetic,u.lastnamephonetic,u.middlename,u.alternatename,u.firstname,u.lastname, ug.firstnamephonetic AS graderfirstnamephonetic,ug.lastnamephonetic AS graderlastnamephonetic,ug.middlename AS gradermiddlename,ug.alternatename AS graderalternatename,ug.firstname AS graderfirstname,ug.lastname AS graderlastname, (SELECT MAX(finalgrade)
FROM mdl_grade_grades_history h
WHERE h.itemid = ggh.itemid
AND h.userid = ggh.userid
AND h.timemodified < ggh.timemodified
AND NOT EXISTS (
SELECT ?
FROM mdl_grade_grades_history h?
WHERE h?.itemid = ggh.itemid
AND h?.userid = ggh.userid
AND h?.timemodified < ggh.timemodified
AND h.timemodified < h?.timemodified)) AS prevgrade,
CASE WHEN gi.itemname IS NULL THEN gi.itemtype ELSE gi.itemname END AS itemname
FROM mdl_grade_grades_history ggh
LEFT JOIN mdl_grade_items gi ON gi.id = ggh.itemid
JOIN mdl_user u ON u.id = ggh.userid
LEFT JOIN mdl_user ug ON ug.id = ggh.usermodified
WHERE gi.courseid = ? ORDER BY timemodified DESC, id DESC LIMIT ?, ?