Copy of DB behaves different from original

Hi all,

I have a database that I made a copy of (useing pg_dump) to test a new
program on. The program runs just fine on the new(copy) database. However,
when I switched my program to run on my old(original) database it runs
around 10 times slower and takes up way more processor power. I tried
vacuumdb on the old database and it made no difference. Any idea what my
problem might be? I could just drop and restore the old database, but I
would really like to understand what might be going on so I could watch for
it in the future and hopefully prevent it from happening again.

Any information is greatly appreciated.

Jason Haselbauer
Soundconcept.net
jason(at)soundconcept(dot)net