Shulou(Shulou.com)06/01 Report--

This article is to share with you about how to view memory usage under Linux. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

1./proc/meminfo

The easiest way to see RAM usage is through / proc/meminfo. This dynamically updated virtual file is actually a combination of many other memory-related tools (such as free / ps / top). / proc/meminfo lists all the memory usage you want to know. Memory usage information for processes can also be viewed through / proc//statm and / proc//status.

$cat / proc/meminfo

2.atop

The atop command is a monitoring command for a terminal environment. It shows the synthesis of various system resources (CPU, memory, network, Imax O, kernel) and is marked in color under high load.

$sudo atop

3.free

The free command is a quick way to view memory usage, and it is an overview of the information gathered by / proc/meminfo.

$free-h

4.GNOME System Monitor

GNOME System Monitor is a view tool that shows the usage of CPU, memory, swap, and network in the most recent period. It also provides a way to view CPU and memory usage.

$gnome-system-monitor

5.htop

The htop command shows the real-time memory usage of each process. It provides reports on the resident memory size of all processes, the total program memory size, the shared library size, and so on. The list can scroll horizontally and vertically.

$htop

6.KDE System Monitor

The function is the same as the GENOME version introduced in 4.

$ksysguard

7.memstat

Memstat is a command that effectively identifies the use of virtual memory by executable (s), process (es) and shared libraries. Given a process ID,memstat, you can list executables, data, and shared libraries associated with that process.

$memstat-p

8.nmon

Nmon is a ncurses-based system benchmark tool that monitors the interaction patterns of CPU, memory, Imax O, file systems, and network resources. For the use of memory, it can display the total / remaining memory, swap space and other information in real time.

$nmon

8.nmon

Nmon is a ncurses-based system benchmark tool that monitors the interaction patterns of CPU, memory, Imax O, file systems, and network resources. For the use of memory, it can display the total / remaining memory, swap space and other information in real time.

$nmon

9.ps

The ps command can display the memory usage of each process in real time. Reported memory usage information includes% MEM (percent of physical memory used), VSZ (total amount of virtual memory used), and RSS (total amount of physical memory used). You can use the "- sort" option to sort processes, such as by RSS:

$ps aux-sort-rss

10.smem

The smem command allows you to count the memory usage of different processes and users based on / proc information. An analysis of memory usage can export charts (such as bar charts and pie charts).

$sudo smem-pie name-c "pss"

11.top

The top command provides real-time resource usage statistics for running programs. You can sort according to the use and size of memory.

$top

12.vmstat

The vmstat command displays real-time and average statistics, covering CPU, memory, Izod O, and so on. For example, in the case of memory, not only physical memory is displayed, but also virtual memory is counted.

$vmstat-s

Thank you for reading! This is the end of this article on "how to check memory usage under Linux". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.