[Zope] Catalog memory usage issues

[R. David Murray]

So the Status tab talks about Catalog using less memory if the word
count on the subtransactions is set lower.  I tried setting it to 500,
and my Zope grew to 204M, which is exactly the same size it grew to
when words was set to 10000.  (Don't ask me why it was set that high...).

What is going on here?  It's making my system swap itself to death,
so it takes forever for the 'update catalog' to complete, and then I
have to restart Zope afterwards to bring performance back to normal.

This is Zope 2.1.4 on FreeBSD 3.4-stable.

--RDM