compressed Subversion dump files are larger than uncompressed file

We are using SVN 1.7 and running in Solaris 10. Recently we've introduced
incremental backup and the dump files will be compressed after the dump
operation.

The following are the commands that are used,

svnadmin dump -q --incremental -r0:30700 /path/to/repos > /path/to/dmp

gzip -1 /path/to/dump

But the issue here is the .gz file is double the size of dump file. Means,
the dump file size is 500MB whereas the .gz file is of 850 MB size.

I tried gzip -9 as well but that doesnt solve the purpose either as it
compresses to an 650 MB file.

Can anyone tell me what could be the issue here?

Thanks,

Sakthi
Received on 2013-11-21 15:31:13 CET