How do you read ps aux?
3 Answers
- USER = user owning the process.
- PID = process ID of the process.
- %CPU = It is the CPU time used divided by the time the process has been running.
- %MEM = ratio of the process’s resident set size to the physical memory on the machine.
- VSZ = virtual memory usage of entire process (in KiB)
What is VSZ RSS?
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 ps aux used for?
The ps aux command is a tool to monitor processes running on your Linux system. A process is associated with any program running on your system, and is used to manage and monitor a program’s memory usage, processor time, and I/O resources.
What is Max RSS?
The resident set size (RSS) is the amount of space of physical memory (RAM) held by a process. The peak resident set size (Peak RSS or Max RSS) refers to the peak amount of memory a process has had up to that point.
What are the options for the ps aux command?
The options A and e provide summarized overview of running processes. To print the detailed overview, use the options f (full format) and F (extra full format) with these options. To view the same output in BSD Unix style, use the options ” aux “. The ” ps aux ” command is the most frequently used command by Linux administrators.
What does VSZ mean for memory in Linux?
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. For example, many applications have functions to carry out certain tasks, but may not load them into memory until they are needed.
What do top’s% Mem and VSZ mean?
%MEM — Memory usage (RES) A task’s currently used share of available physical memory. How can this process consume more than 100% memory? And if it’s such a memory hog, why are there still 88564K RAM free on the system? The man page you refer to comes from the procps version of top.
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.