Solaris Master/Media Server

Hello,

Have a Solaris master/media server with 4 CPUs (1500Mhz) and 32 GB of RAM that I inherited running NBU 6.5.  I am only able to run 45 streams at a time.  When I try to raise this limit, all the jobs fail with resource errors.  I want to have the O/S team monitor the server, but unsure on specifically what to have them look at. 

I know NBU 6.5 is EOSL, but can't upgrade 'till we are sure the hardware is sufficient.  So, need help to see how many clients this shuld support and how to hav the OS team help me.

Thanks,