Q on SQL Performance tuning

Hi Team, I've few Questions on SQL perf tuning.

1) Is there any SQL monitoring report that's available in Oracle. Highlight of the report is it tells the % of time spent on CPU & IO. And which step took how much % in overall execution.

2) Is there anyway to know the historical execution plan details of a particular SQL ? Per my understanding so far since there is no concept of shared pool unlike Oracle every execution demands a new hard parse. However wanted to check with experts to know if any extension available on this?

Thanks!
-Kaushik

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