If I dump an FSFS copy of the old CollabNet Subversion repository the memory use
(as reported by VIRT in top) of the svnadmin process steadily increases during
the dump and reaches 350MB after 40,000 revisions. This means there is a limit
to the number of revisions that can be dumped in one go.
By contrast, if I dump a BDB copy of the repository the memory use remains more
or less constant at just under 100MB.
Both the BDB and FSFS repositories were created/loaded using 1.6. The FSFS
repository is not packed but has rep-sharing enabled.