Here are the opinions from the experts:
https://community.oracle.com/tech/apps-infra/discussion/comment/16793635#Comment_16793635
As mentioned in the above Oracle Communities thread: There is also a single compute instance micro-deployment if the reference architecture is too resource intensive for your current needs: https://github.com/oracle-quickstart/oci-arch-wordpress-mds/tree/master/micro-deployment




