Dump sizes

Hi All,
I've been examining my backups created by svnadmin dump and have some
concerns.

According to the subversion book:
"By default, the dump file will be quite large—much larger than the
repository itself."

However, I'm having a look at my repository and the backups:
Original Repository size 11 MB
svnadmin --deltas -r 0:408 2.4 MB

I then created another repository using svnadmin load < dump
Repository recreated from backup 12 MB

Then I thought I'd check what the full backup takes instead of --deltas
svnadmin -r 0:408 5.8 MB

I'm using subversion 1.1.3 on Gentoo Linux with a bdb repository, the
repository contains server configuration, so is almost entirely text.
I used du -sh to get the sizes.

I've then run some svn ls, log and cat commands on the repository
created from the backups and all seems well.

Is this normal? Should I be concerned?

Regards
Chris

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