How can I visit the performance tab when the target DB is down?

Hi, All:
I wonder if it is possible to visit the performance tab when the target DB is down. I thought it should be possible. But whenever I first click the performance tab, I will be asked to enter the user/passwd for the target db(I have set the preferred credentials).
Furthermore, is it possible to analyze the history sql/performance if the target db is not startup? and how can I do it?
Thanks in advance

I have seen other postings by the same ID and my suggestion is that you have a look at the Enterprise Manager Documentation Library. After that, you can ask questions relating to subjects you cannot solve with the documentations.
http://www.oracle.com/pls/db102/portal.portal_db?selected=21

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