When I use a lot of RAM (90-100%) then the laptop normally starts using SWAP so if I look in
htop during that intense usage I see it's using 200MB of SWAP. But when I stop using the laptop (the computer is idle and running) the SWAP is still used, it's not cleared as the RAM is.
Why is that?
- System: Ubuntu 11.04 64-bit
- Laptop: Asus 1201n 2GiB RAM, 2GiB SWAP, 1.6 ghz dual core cpu.