Retrieve CPU usage and memory usage of a single process on Linux?

Question

I want to get the CPU and memory usage of a single process on Linux - I know the PID. Hopefully, I can get it every second and write it to a CSV using the \'watch\' command

Answer 1

The following command gets the average of CPU and memory usage every 40 seconds for a specific process(pid)

pidstat 40 -ru -p 

Output for my case(first two lines for CPU usage, second two lines for memory):

02:15:07 PM       PID    %usr %system  %guest    %CPU   CPU  Command
02:15:47 PM     24563    0.65    0.07    0.00    0.73     3  java

02:15:07 PM       PID  minflt/s  majflt/s     VSZ    RSS   %MEM  Command
02:15:47 PM     24563      6.95      0.00 13047972 2123268   6.52  java