That way we don’t start panicking when the server says 99% of memory is being used, but in reality that memory is being used by the Linux page cache. 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. 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. If you would like to see the amount of free memory, type in ‘free -m -t’ instead. This will display the total amount of RAM installed in your system, as well as the amount of RAM that is being used. The %memused column shows how much memory was used as a percentage of total memory available. To check the amount of RAM installed in your Linux Ubuntu system, open the terminal and type in ‘free -m’. The kbmemused column shows how much memory was used. Check out some of the command line methods below to check your physical memory (RAM) size in Linux. Checking your RAM usage is a great way to close tasks. free Command /proc/meminfo File vmstat Command psmem Command smem Command top Command htop Command glances Command 1) How to Check Memory Usage on Linux Using the free Command Free command is the most powerful command widely used by the Linux administrator. We recommend that you use the CloudWatch agent to collect metrics and logs. Important The CloudWatch monitoring scripts are deprecated. The kbmemfree column shows how much memory was free. Doing so will open your Windows computers task manager menu. The following commands can help you check memory usage in Linux in different ways. AWS Amazon EC2 Monitor memory and disk metrics for Amazon EC2 Linux instances PDF RSS You can use Amazon CloudWatch to collect metrics and logs from the operating systems for your EC2 instances.
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