Linux df command The df command stands for 'disk-free,' and shows available and used disk space on the Linux system.
When kbmemused is over 917504 KB or 896 MB, and kbcached is under 131072 KB or 128MB this command will output the memory usage stats from sar.ĭoing it this way we can ensure that we’re only looking at times when our actual free memory on the server has dipped below 128MB. Linux has a few built-in utilities that help provide that information. The command below goes through your sar logs and shows anytime that your server’s memory is spiking. The kbcached column shows how much memory was cached. It displays information about the total, used, and free memory. However, you could also use -b (bytes), -k (kibibytes), or -g (gibibytes). In our example, we’ll use the -m (mebibytes) option. It also shows you the total amount of swap space configured, and how much is used and available. The %memused column shows how much memory was used as a percentage of total memory available. free Command free is the most commonly used command for checking the memory usage of a Linux system. The free command gives you a table of the total, used, free, shared, buffer/cache, and available RAM on your computer. The following command will help you get the details of total ram, ram usage, free available ram. The kbmemused column shows how much memory was used. The kbmemfree column shows how much memory was free. Use the lsmem command to list your memory. Compared to the /proc/meminfo file, the free command provides less information. List the available memory to find out how much memory is available and which memory blocks are online.
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