I am trying to test a schema modification. That is i need to add one of the attributes to global catalog by modifying schema , initially in a lab which is exact replica.My questions are below;

-> What tests need to be done post schema change to determine if its safe for production? -> Apart from measuring changes in DIT size post change, is there a way to find the whole size increase for adding an attribute to GC pre change?

please let me know if any extra questions or info required.