Yep it was spark who wrote the table docs (Hard to find. It took me a while, the table command isn't documented in the iRules wiki that I can find. The article is at http://devcentral.f5.com/Default.aspx?tabid=63&articleType=ArticleView&articleId=2375)
However I can't find the article I remember seeing that gave an indication on how much memory each table entry used... From memory you can see the information from tmctl counters somewhere... So assuming we can find which counter it is, we could write an iRule to create X thousand entries and then check that... And X more... And check again, to give a graph of how much memory for X number of table entries.
H
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