> [...] or you’ve exhausted your RAM at such a rapid pace that the disk IO cannot keep up with the read and writes to swap. I don't know what that means. When

> [...] or you’ve exhausted your RAM at such a rapid pace that the disk IO cannot keep up with the read and writes to swap. I don't know what that means. When your system is in such extreme memory pressure, it comes to a crawl, exactly because your memory use can't outpace your IO. There's no 'cannot keep up' state.