An approach is provided for monitoring disk utilization at an object level. At a first time a first size of an object in a System i computing platform is determined by calling an application programming interface (API). At a second time a second size of the object is determined by calling the API. A difference between the first and second sizes is determined. The difference is determined to be greater than a threshold. Based on the difference exceeding the threshold, an alert is sent indicating growth at the object level rather than at an auxiliary storage pool level. The API is called to obtain the sizes of objects in an integrated file system in the System i computing platform. Differences between the sizes of the objects at a user-entered start date and the current time are determined and presented. A report including the differences is generated and sent.