Have updated answers for some of the questions. For rest will update as soon as I write relevant article on the same.
Answer : Troubleshooting longrunning jobs
Identifying long running jobs
Related Link : How to start or stop livecache in SCM or APO system?
Answer : Please go through below related links
Answer: SPAM is the transaction code used to perform support pack upgrade in ABAP stack.
Answer: For example, You can reply based on the operating system you are using like AIX operating system with version 5.3