What is RSS and VSZ?

RSS is the Resident Set Size and is used to show how much memory is allocated to that process and is in RAM. VSZ is the Virtual Memory Size. It includes all memory that the process can access, including memory that is swapped out, memory that is allocated, but not used, and memory that is from shared libraries.

What does VSZ mean in Linux?

Virtual Memory Size
VSZ is short for Virtual Memory Size. It’s the total amount of memory a process may hypothetically access. It accounts for the size of the binary itself, any linked libraries, and any stack or heap allocations. When a process is started, VSZ memory becomes RSS memory, over which we’ll go now.

What is VSZ in ps output?

VSZ is the Virtual Memory Size. It includes all memory that the process can access, including memory that is swapped out, memory that is allocated, but not used, and memory that is from shared libraries.

What is process TTY?

TTY – The name of the controlling terminal for the process. TIME – The cumulative CPU time of the process, shown in minutes and seconds. CMD – The name of the command that was used to start the process.

What’s the difference between VSZ and RSS memory usage?

The VSZ size is therefore not usually an accurate measurement of how much memory a process is using, but rather an indication of the maximum amount of memory a process can use if it loads all of its functions and libraries into physical memory. RSS is Resident Set Size.

What does VSZ mean on a Linux system?

Values appear in kilobytes for every process that’s running on the system. VSZ is Virtual Memory Size. This is the size of memory that Linux has given to a process, but it doesn’t necessarily mean that the process is using all of that memory.

What does RSS mean in memory management stack?

RSS is the Resident Set Size and is used to show how much memory is allocated to that process and is in RAM. It does not include memory that is swapped out.

What’s the difference between VSZ and virtual memory?

It does include all stack and heap memory. VSZ is the Virtual Memory Size. It includes all memory that the process can access, including memory that is swapped out, memory that is allocated, but not used, and memory that is from shared libraries.