The diagram on the System Configuration page does not show any connections between compilers and the PostgreSQL node for XL installations. This can cause (and has caused) a client to mistakenly open up port 5432 between the compiler and master, expecting the legacy compiler conversion to work.
(this is also incorrect on 2019.7 docs)
No arrow for port 5432 splitting off from "Compilers" to "PE-PostgreSQL"
An arrow for port 5432 splitting off from "Compilers" to "PE-PostgreSQL"
The system configuration diagram for XL environments needs to show port 5432 opened between Compilers and the external PE-PostgreSQL node.