Monitoring a Process Mem and CPU in Linux

Explained about Virtual Memory and Hows it works with Block diagram

https://www.cs.uic.edu/~jbell/CourseNotes/OperatingSystems/9_VirtualMemory.html 

https://www.digitalocean.com/community/tutorials/atop-command-in-linux

Useful option: 

atop

• SYSCPU - The amount of CPU consumed by the process while system handling.
• USRCPU - The amount of CPU consumed by the process, during its running in user mode.
• VGROW - The amount of virtual memory that the process has occupied since the last value update.
• RGROW - The amount of resident (physical) memory grown since last value update.
• RDDSK - The size of data transferred during disk reads.
• WRDSK - The size of data transferred during disk writes.
• RUID - The real user ID under which the process is being executed.
• EUID - The effective user ID under which the process is being executed.
• ST - The current status of the process.
• EXC - The exit code after the process terminates
• THR - The number of threads within the process.
• S - The current status of the primary thread of the process.
• CPU - The percentage of CPU utilization of the entire process.
• CMD - The name of the process.

 atop -m 

• MINFLT - The number of minor page faults that have been solved by accessing data from free pages.
• MAJFLT - The number of major page faults that have been solved by especially retrieving data from disk.
• VSTEXT - The virtual memory occupied by the process text.
• VSLIBS - The virtual memory occupied by the shared libraries of the process.
• VDATA - The virtual memory size of the private data of the process.
• VSTACK - The virtual memory size of the private stack of the process.
• VSIZE - The total virtual memory size of the process.
• RSIZE - The total resident memory occupied by the process.
• MEM - The percentage of RAM consumed by the process.