logging top CPU and MEM usage

Hacked a script to dump a log of the top CPU and MEM processing for a machine a while back.. All the info for it was nicked from here:
http://unixskylab.wordpress.com/2009/01/05/my-favorite-aix-top-resource-consuming-commands/

I figure its a rather useful little script to keep handy... so here is a quick reproduction but I don't have an AIX machine at home so its 50-50 that the AIX version will work off the bat... And after a couple of tweeks its ready and tested for ubuntu...

For AIX (untested)

while [ 1 ]; do 
  DATE=`date "+%Y%m%d"` 
  LOG=cpu_mem.log.$DATE 
  if [ 1 ]; then 
    echo; 
    date; 
    ps aux | head -1; 
    echo "TOP MEM"; 
    ps aux | sort -rn +3 | head; 
    echo "TOP CPU"; 
    ps aux | sort -rn +2 | head -10; 
    sleep 10; 
  fi | tee -a $LOG 
done 

For Unbuntu

while [ 1 ]; do 
  DATE=`date "+%Y%m%d"` 
  LOG=cpu_mem.log.$DATE 
  if [ 1 ]; then 
    echo; 
    date; 
    ps aux | head -1; 
    echo "TOP MEM"; 
    ps aux | sort -rnk4 | head; 
    echo "TOP CPU"; 
    ps aux | sort -rnk3 | head -10; 
    sleep 10; 
  fi | tee -a $LOG 
done