Monitoring Oracle 9i

Hello,
someone knows some software for monitoring oracle databases? I want that it
shows graphs. I'm trying it with cricket and cacti, but I've Oracle 9i
database and the scripts for cacti/cricket are for Oracle8. I also have some
problems for configuring Oracle SNMP on databases that run in unix servers
(with AIX exactly). If someone has experience with it, I would thank for
much his aid.
Thanks beforehand.

P.D.: Sorry for my bad english.

Cheers...

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