If you still see % did not go down, then run the following command to see the unused processes, for example to see unused processes in /var filesystem:

d02http003:/# fuser -dV /var
/var:
inode=4123 size=9567989 fd=6 13938
inode=6175 size=19190691 fd=4 29172
Then verify the name of these id, by running:
#ps -deaf | grep 29172
root 29172 8780 0 Dec 06 - 144:09 /usr/lpp/ssp/bin/pmand
You can kill that unused id and it will restart it automatically but make sure you verify that it is restarted