This is an APEX application (created with APEX 23.2) to present tablespace usage data, retrieved from your OEM 13c. It uses spaceUsed, bytesFree and pctUsed metrics to display graphs about Used (GB) space, Free (GB) space and Used (%).
First of all, you will need to create three views under your APEX workspace schema (tbs_usage_objs.sql). If your APEX installation lies in the same database with your OEM installation, you will need to give to your APEX workspace schema/user the necessary SELECT privileges on the appropriate SYSMAN objects (MGMT$TARGET_TYPE, MGMT$METRIC_DAILY, etc). If your APEX installation is in another database than your OEM installation, then create a database link from your APEX workspace schema/user to the OEM's SYSMAN and make the appropriate changes to the views and procedure's definitions.
Finally, import in your APEX workspace the application (f1002.sql).
