Originally Posted by
sergiu
Modern operating systems tend to swap first program data (the one that is not modified during the entire lifetime, like constants) and program code. This kind of usage will translate in a write once, read anytime scenario, as when OS needs more memory, it just delete what it already has on disk. There is also the "normal" swapping of data which might be read, modified and then swapped back. For this to be the dominant scenario, you would need to run at least two programs which are active all the time and their cumulative memory usage is well beyond total memory. If this is happening all the time, you will notice it quite easily, as even with a SSD, the throughput of the programs will be very low compared to their potential maximum. For this only more memory helps.
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