I wanted to explore what really happens in the background and understand the whole flow during upgrade and product support pack implementation.
This is the most comprehensive guide ever written for vRSLCM in terms of upgrade
So , I decided to deploy a vRSLCM 8.6.2 and then upgrade it to 8.8. After that's successful , i would then apply 126.96.36.199 Policy that's PSPAK1
Here's the link to the whole documentation , download the pdf which has compete steps and snippets
Attaching mind map here just for reference. This is present in the pdf too.
Snippets in the document explains what log you need to check on each phase of the upgrade