I ran across following definition of vm.swappiness:
The swappiness parameter controls the tendency of the kernel to move processes out of physical memory and onto the swap disk.
So, if I have no swap partition any change on this parameter will be in vain?
I'm pretty much sure it is so, but I wanted to check. If I'm writing from another system over Ethernet to my running board with attached disk, data is first being cached (via memory mapping), and then written to disk via DMA right?
What if my RAM gets full in the meantime?