I have set "keep stanard log" only for 5 days in Moodle 3.1
However, I find the stanard log is kept for 1 years.
Since the stanard log size is too large, I want to purge standard log only for 5 days.
Please advise how to do it.
Also, I also want to set "kept grade history" to 180 days only.
If i set, do it only purge grade history, any submiited grade for assigment in old Moodle courses are still kept or not?