The swap use you showed is just a few 4k pages - nothing to worry about. Or as above, if that app exits - the swap and physical memory pages are made available by kernel for other processes to use. If that app is woken up and needs those pages to do something - they will be paged back into physical memory. Thats the way things are designed to work - its fine. So if an idle process is ejected from ram to swap to make room for your web page, and you exit the web page - those app pages will stay in swap until they get called on when needed - if not needed they will simply stay in swap - or if the owning process exits then all memory pages physical and swap will be returned to kernel to give out to other processes The CPU free memory threshold configuration is saved across a switch reboot. Swap is just an extension of physical memory - adding a tab adds to memory demand - when there isn't enough available ram, the kernel finds pages to page out to swap - those pages will be freed when not needed.
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