Nonzero si and so numbers indicate that there is not enough physical memory, which causes the kernel to swap memory to disk. So is the amount of memory swapped out to disk (per second). Si is the amount of memory swapped in from disk (per second). The next two columns give information about swap: Swpd is the amount of used virtual memory.īuff is the amount of memory used as buffers.Ĭache is the amount of memory used as cache. The next four columns give information about memory: ![]() These are processes that are idle and waiting to run.ī is the number of processes that were in sleep mode, and were interrupted since the last update. R is the number of processes that are in a wait state. The first two columns give information about processes: The output is broken into six sections: procs, memory, swap, io, system, and cpu. ![]() Run the vmstat command without any options. Watch the video below for an overview on vmstat. You might consider maximizing your viewing area by using the Hide steps and the “ Full screen” controls located in the task bar, as shown in the images. You can observe page-ins and page-outs as they occur on the system. Vmstat shows how much virtual memory there is and how much is free. Note: When using the free lab environment, see Oracle Linux Lab Basics for connection and other usage instructions.
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