LNMP environment memory consumption need to add memory

LNMP, Memory 512MB.

Physical memory: Total 489.27 m, used 459.78 m, idle 29.49 m, usage 93.97% cache memory 228.51 M, usage 46.7%| Buffers buffer for 0 m real memory using 231.27 m, real memory idle 258 m, usage 47.27%swap zone: Total 478.99 m, used 75.49 m, idle 403.5 m, utilization 15.76

There is no need to add memory

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LNMP, Memory 512MB.

Physical memory: Total 489.27 m, used 459.78 m, idle 29.49 m, usage 93.97% cache memory 228.51 M, usage 46.7%| Buffers buffer for 0 m real memory using 231.27 m, real memory idle 258 m, usage 47.27%swap zone: Total 478.99 m, used 75.49 m, idle 403.5 m, utilization 15.76

There is no need to add memory

Real memory using 231.27 m, real memory idle 258 m, utilization 47.27

It's clearly written, but it's not necessary.

The realused = total - free - buffer - cache

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