When having two large applications open in Ubuntu can cause slow performance because of swapping memory from hard disk to RAM, it leaves one perplexed to see swap space still being used after all applications are closed.
I investigated this a bit more to find out that it's better not to mess around with the kernel's swappiness parameter, and that using the "top" program or other scripts is not really necessary. You don't even need to use vmstat to check the si and so columns to see if swaps-in and swaps-out are happening.
There's a far simpler option that promptly copies all swap memory back to RAM.
Enjoy!
I investigated this a bit more to find out that it's better not to mess around with the kernel's swappiness parameter, and that using the "top" program or other scripts is not really necessary. You don't even need to use vmstat to check the si and so columns to see if swaps-in and swaps-out are happening.
There's a far simpler option that promptly copies all swap memory back to RAM.
sudo swapoff -a; sudo swapon -a
 |
| I opened a large application by the time I took the screenshot, hence the greater usage |
Enjoy!
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