"low open file" at solaris

Hi, all,

    I believe many people are running oracle 9i on solaris platform. Does anyone noticed this message while starting oracle instance at solaris:
"Wed Dec 15 21:00:06 2004

Oracle instance running on a system with low open file descriptor limit. Tune your system to increase this limit to avoid severe performance degradation.
"

  According to metalink, os parameter "open files" (rlim_fd_max at solaris?) need to be tuned as formular: 2*db_files + controlfile+logfile ..., if my db_files=1000, then I have to set rlim_fd_max to near 2400. Without changing this parameter, will there really be some performance degradation?

If I reduce the db_files to 100 or so, then no warning any more.

Thanks.

-- 
Regards
Zhu Chao
www.cnoug.org
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