I am not a Solaris expert, But I do know that Solaris 10 is controlled by prctl function not the /etc/system file. Solaris 10 will ignore the /etc/system file as far as I know, that may have changed.
The following link is for Solaris
http://docs.sun.com/app/docs/doc/819...33?l=en&a=view
The 11.50 machine notes do reference the resource control but no specifics, it does refer to a man page.
http://publibfp.boulder.ibm.com/epub...280.html#sun64
Below is a link for oracle that might be helpful.
http://www.oracle-base.com/articles/...rnelParameters
If none of this helps you might want to check with either Solaris or Informix tech support