When upgrading from 2.6 to 2.7 and using Oracle DB the docs call out steps 1, 2, 4, and 8 specifically in the oracle build process.

However it looks like a new step was added to the oracle build process so it should now be 1, 2, 4, 8 and 9.

Original steps:
https://gitlab.cee.redhat.com/red-hat-3scale-documentation/3scale-documentation/-/blob/5846683037398d4141cdf82123b4e6bb65fed3d4/docs/topics/system-oracle-support.adoc

Current Steps:
https://access.redhat.com/documentation/en-us/red_hat_3scale_api_management/2.7/html/installing_3scale/setting-up-threescale-with-oracle-database#building-the-system-image