ORA-27146: post/wait initialization failed

I recieved this error when I bumped up the processes to 500 from 250. There is one other database on the server with processes set a 200. The /etc/system parameters are:

set semsys:seminfo_semmap=0x13d
set semsys:seminfo_semmnu=0x13d
set semsys:seminfo_semmns=1317
set semsys:seminfo_semmni=312
set semsys:seminfo_semmsl=429

I set the processes to 300 and the database was able to start.

So with that in mind going by Oracle's formula for setting semmns, (500 + 200) + 500 + (10 *2) = 1220. So techinally I should not be running into this error based on this criteria. Does Oracle also look at semmsl or semmni? This is a Sun Solaris server.

Thanks in advance,
Rich

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