How to monitor page hit rates?

I see a lot of references in docs and white papers to cache hit rates for the Parallel Page Engine, but I've not found any documentation on how to monitor this system-wide (only how to turn on portlet statistics and get a manual page-by-page look at cache success/failure).
Is there any way to determine the cache hit rate for the PPE?

Stephen,
I'm sorry you seem to be experiencing some problems with the support and documentation of the portal software.
The link above was posted on May 1st 2002, and was posted as an absolute link rather than a dynamic product link. As the document name is revved the link will change, hence why an old link from the forums will no longer work.
The document you seek is here. I assume that by referring to webcache you mean that when you add the XLF logging format options webcache complains about x-ecid (for example). This indicates that you have not applied the core iAS patchset which is required to allow webcache to understand these extended log parameters. I believe that the document refers to this as a requirement to get 'full functionality' - perhaps that is a little esoteric, I'll change it in the next rev.
If you continue to be unsuccessful in deploying this note please let me know what errors you're seeing and I'll see what I can do. I'm working on an end-to-end performance kit at the moment that will supercede this document so I'll take your comments on board when revving this area.
Regards
Jason Pepper
Principal Product Manager
Oracle9iAS Portal

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