Merging Performance data from multiple instance

I use Enterprise Manager to look at instance performance graphs. There are several instance for which I would like to see a combined or merged graph. Is it possible to do that within EM or do I need to union the ASH tables together and create my own graphs?

Any suggestions would be helpful.

I remember a presentation from someone at Hotsos who built an EM replacement in Python or some such. Is there a community tool that might have this capability?

Mark Brady

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