Well, I changed the db_files from 2000 to 500.. still same message

Code:
Tue Jul 11 15:04:58 2006
cluster interconnect IPC version:Oracle UDP/IP (generic)
IPC Vendor 1 proto 2
Tue Jul 11 15:04:58 2006
WARNING:Oracle instance running on a system with low open file descriptor
        limit. Tune your system to increase this limit to avoid
        severe performance degradation.
I am missing something some where