Find The Process ID Which Is Hogging CPU / Memory?

Trying to find the Process ID which is hogging CPU/Memory

$ ps -e -o pcpu,pid,user,tty,args |grep -i oracle|sort -n -k 1 -r|head

here , this works well ..

TOP 10 PROCESSES CONSUMING MOST CPU

$ watch ps -e -o pcpu,pid,user,args |sort -k 1 -n -r | head -10

this is not working ... always i am getting following output

QUOTE x processes w/o controlling ttys t by tty
*********** output format ********** *********** long options ***********
-o,o user-defined -f full --Group --User --pid --cols --ppid
-j,j job control s signal --group --user --sid --rows --info
-O,O preloaded -o v virtual memory --cumulative --format --deselect
-l,l long u user-oriented --sort --tty --forest --version
-F extra full X registers --heading --no-heading --context
********* misc options *********
-V,V show version L list format codes f ASCII art forest
-m,m,-L,-T,H threads S children in sum -y change -l format
-M,Z security data c true command name -c scheduling class
-w,w wide output n numeric WCHAN,UID -H process hierarchy