Question on memory utilization

We have a T3-1 server with 64 GB memory. Below are the zones running on the server and as per "prstat -Z", the memory consumed by all 4 non-global and global is < 50%.

ZONEID    NPROC  SWAP   RSS MEMORY      TIME  CPU ZONE                       

     0       61  261M  339M   0.5%  10:09:26 0.0% global                     

     3       54 3069M 2914M   4.5%   6:48:52 0.0% appzone               

    23       32 2088M 1692M   2.6%   2:46:23 0.0% p2zone

    24       84   14G 7114M    11%   4:49:03 0.0% p1zone

     4       54   17G   16G    25%  10:11:06 0.0% ldapzone

Whereas our monitoring tool and "top" command shows that only 1.7GB left (> 90% used).

How to find which process is consuming memory or are "top" and monitoring tool is wrong?

Clarification on this is really appreciated.

Thanks In Advance

Moorthy

Probably some other processes on global zone is taking up the memory ( generally global zone does not have any other application)