Few changes were made in the quota design,
Main issues that were changed :
1.Quota usages will be calculated and fetched using DB function instead
Using memory should improve performance and prevent integrity issues.
2.Default unlimited quota will be assigned with resources only when DC
is at disable mode, in any other DC mode, user should not notice it as a
consumable quota or consume new resources from it.
You can view quota changes in the following design wiki: