Hello everyone, Could you kindly tell me what is persistent grades feature exactly? why is it disabled by default? and is it safe to enable it for a site with 20K learners or not? is there any documents about it? (unfortunately I didn’t find anything by googling.) thank you very much

By default, grades in Open edX are computed on the fly and are not stored in the database. This can make it slow/expensive to do things like produce reports of grades for a large course. Enabling persistent grades causes the grades to be stored in the database (MySQL), which makes a lot of grade-rel…

[image] braden: I am also curious about why the persistent grades feature is still disabled by default and why the “non persistent” grades mode still exists at all. Would someone from edX be able to comment on that? +1 to that question - maybe @dave would know? If there are still issues with …

I suspect it’s mostly because the transition was bumpy and we never got back to it after things had stabilized. My understanding is that it took weeks to backfill the grades for edx.org , and we had some early operational issues. Also, it’s worth noting that it is computationally expensive–about 2/3r…

Hi, we found that in Ironwood or Juniper.master, when persistent grades are enabled and edx_sga xblock is graded, this makes lms.djangoapps.grades.tasks.recalculate_subsection_grade_v3 to throw a DatabaseNotReadyError() , and progress page is not updated…! To reproduce it, enable persistent grade…

@dave Do you have any collection of potential issues with persistent grades? I looked for them, but found nothing. Some days ago, we bumped into an issue related to persistent grades, and/or probably visual blocks. The issue may be caused by a race condition or similar, though we were not able to r…

@gabor , Recently we enabled this feature on our Ironwood.master instance and we had a kind of Integrity Error. I wrote this patch to fix it. I haven’t rolled this back to see if the issue has gone or not. fix-persistent-grades-IntegrityError.patch (1.4 KB)

Hello @mahyard , Thank you for sending the patch! I’ll check it today if it is related to the issue we experienced. :pray:

I wasn’t able to try it out yet, but I’ll follow up as soon as I have a result (latest on Monday). Thank you again for the patch.

As I promised, I’m getting back to here. I have no results yet, I’ll post the results as I have them.

Sorry if I bothered you, but I think this depreciation should be mentioned along this thread. [image] Deprecation/Removal: PersistentGradesEnabledFlag (DEPR-152) Deprecation Hi there, We plan to deprecate and remove the PersistentGradesEnabledFlag model, CoursePersistent…

Need information about persistent grades

Site Operators

antoviaque (Xavier Antoviaque (OpenCraft) - opencraft.com/help) February 24, 2020, 8:31am 3

+1 to that question - maybe @dave would know? If there are still issues with persistent grades, it would be good to have them in mind. Or if there is no reason to keep it off by default now, it might be worth switching the default for the upcoming Open edX release? CC @regis @nedbat

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Need information about persistent grades

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