April 2019 CPU, the WLS connection filter is turned on by default.

As of the April 2019 CPU, the WLS connection filter is turned on by default. You will not be able to access the Oracle WebLogic Admin Server ports if you do not perform the instructions in "Managing Configuration of Web Application Services" of the Oracle E-Business Suite Setup Guideand the supplemental information in Document 2542826.1, Alternative Methods to Allow Access to Oracle WebLogic Server Administration Ports from Trusted Hosts for Oracle E-Business Suite Release 12.2.

How To Run The Workflow Directory Services Concurrent Program From The SQLplus Prompt (Doc ID 1213304.1)

E-Business Suite Workflow Suggested Parameters For "Workflow Directory Services User/Role Validation" Program To Synchronize The Roles Assigned To Users (Doc ID 418765.1)

Oracle Performance

https://blogs.oracle.com/ebstech/advanced-compression

Performance Diagnosis with Automatic Workload Repository (AWR) (Doc ID 1674086.1)

Oracle E-Business Suite Release 12.2 with Oracle Database 12c Release 1 Advanced Row Compression (Doc ID 2458161.1)

Using Database Partitioning with Oracle E-Business Suite (Doc ID 554539.1)