top top command displays all the currently running process in the system.

Vmstat -s Displays the amount of memory used and available ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.DevOps Engineering - Planning to Production.

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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. The %memused column shows how much memory was used as a percentage of total memory available. The kbmemused column shows how much memory was used. The kbmemfree column shows how much memory was free.

Monitor ram usage ubuntu