Anomally in backing up repository using tar

[Christopher.Fouts]

I have a cron job that runs every 11:00pm that tars
the whole cvsroot tree 
        > tar -czv /path/cvsroot.tar /cvsroot
It runs but I have an anomally in my tar files. 8/10
I get a file size of around 2MB, but 2/10, I get one
at 450MB. I don't bother locking the repository since
I only have 4 users, and I KNOW that none of us are
using it. Any explanation to this anomally from CVS's
point of view?


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Chris T Fouts