pidstat:tldr:41210

The command "pidstat -r" is used to display the memory statistics for running processes on a Linux system.

Here is the breakdown of each component of the command:

• "pidstat": It is the name of the command-line tool used to monitor process-level resource utilization.
• "-r": It is the option or flag used with pidstat to specify that memory statistics should be displayed. '-r' stands for "memory utilization and page fault statistics."

When you execute the "pidstat -r" command, it will provide you with a table of information about each running process on the system, including the memory-related statistics such as average and current memory usage, major and minor faults, and more.

The output might include columns such as:

• "PID": Process ID
• "minflt/s": Minor faults per second (Number of minor page faults incurred by a process)
• "majflt/s": Major faults per second (Number of major or uncorrectable page faults incurred by a process)
• "VSZ": Virtual memory size (Total virtual memory usage by a process)
• "%MEM": Percentage of memory used by a process
• "%CPU": Percentage of CPU used by a process

By running "pidstat -r" command at regular intervals, you can monitor memory usage patterns and identify processes that are consuming excessive memory resources.