Linux performance monitoring is the process of keeping track of key metrics to help you understand and stay on top of your Linux system. View All Application Management Products. View All IT Service Management Products.In case you need help or want to add any information relating to memory management in Linux systems, please post a comment. These are easy methods one can use and follow to monitor swap space usage in Linux and hope this article was helpful. so: Amount of memory swapped to disk (s).si: Amount of memory swapped in from disk (s).You need to take note of the following in the swap field from the output of this command. To install vmstat on your Linux system, run: $ sudo apt install vmstat The vmstat command is used to display information about virtual memory statistics, information about running processes, memory usage, CPU activity, paging, etc. # glancesįor more information regarding the installation and usage of the glances command, read this article: Glances – An Advanced Real-Time Linux System Monitoring Tool 8. This is a cross-platform system monitoring tool that displays information about running processes, cpu load, storage space usage, memory usage, swap space usage, and many more. # htopįor more information regarding the installation and usage of the htop command, read this article: Htop – Interactive Linux Process Monitoring 7. The htop command is used to view processes in an interactive mode and also displays information about memory usage. To know more about how to install and use atop command in Linux, read this article: Monitor Logging Activity of Linux System Processes 6. But importantly it also shows information about free and used memory space. The atop command is a system monitor that reports about activities of various processes. # topĬheck Swap Space Using Top Command 5. To check swap space usage with the help of the ‘top’ command run the following command. To understand how the top command works, read this article: 12 top Commands to Check Linux Process Activity The top command displays the processor activity of your Linux system, and tasks managed by the kernel in real-time. More usage and examples of free commands can be found at: 10 free Commands to Check Memory Usage in Linux. # free -hįrom the output above, you can see that the last line provides information about the system swap space. Using the free command with -h option, which displays output in a human-readable format. The free command is used to display the amount of free and used system memory. To check swap usage information, you can view the /proc/swaps file using the cat utility. To understand more about this filesystem read our article: Understanding /proc File System in Linux. Therefore you can also refer to it as a control and information base for the kernel. It actually does not contain ‘real’ files but runtime system information, for example, system memory, devices mounted, hardware configuration, and many more. The /proc filesystem is a very special virtual filesystem in Linux, which is also referred to as a process information pseudo-file system. Use -help option to view help information or open the manpage for more usage options. If you want to view a summary of swap space usage by device, use the -summary option as follows. Though devices that are already working as swap space are skipped. To view all devices marked as a swap in the /etc/fstab file you can use the -all option. The swapon command helps you to specify the devices on which paging and swapping will be done and we shall look at a few important options. We shall look at different commands and tools that can help you to monitor your swap space usage in your Linux systems as follows: 1. How Do I Check Swap Space Usage in Linux? The amount of swap space you can set for your Linux system may depend on the architecture and kernel version. On most distributions of Linux, it is recommended that you set swap space when installing the operating system. It is memory management that involves swapping sections of memory to and from physical storage. Swap space is a restricted amount of physical memory that is allocated for use by the operating system when available memory has been fully utilized. How Do I Check Swap Space Usage in Linux?.
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