Unable to create an object from PPM Studio or it takes a long time to create the Object

Document ID : KB000110213
Last Modified Date : 22/09/2018
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Creating custom objects in Project & Portfolio Management (PPM) is very slow, particularly when it is created as a subobject to the project object. 
Ensure the # of custom attributes for the master object it is associated with is within the recommended range. Anything above 100 can cause performance issues. Excerpt from documentation at: CA PPM Studio Objects and Attributes

"Important! The product supports up to 500 total attributes for each object. However, we recommend that you do not assign more than 100 attributes to a single custom object. A high number of attributes can result in performance issues and the potential failure of subsequent upgrades. Consider creating a subobject rather than assigning many custom attributes to a single object."