Swap

Written by  on Januar 8, 2013 

Ein weiterer Grund, warum der verbrauchte Speicher, nicht mit belegtem Speicher plus Swap übereinstimmt: …

As it turns out, swap means more than just pages swapped to disk. An application's binary and libraries need not stay in memory the whole time. The kernel can mark some of the memory pages as unnecessary at the time; but because the binary is at a known location on disk, there is no need to use the swap file. This is still counted as swap because the part of the code isn't resident. In addition, memory can be mapped to a disk file by the application. Because the whole size of the application (VIRT) includes the mapped memory, but it isn't resident (RES), it's counted as swap.

l-lpic3306-pdf.pdf

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