Reducing WSL-2 Memory Usage

Execute the following command (as root):

---

sync && echo 3 > /proc/sys/vm/drop_caches

To put in in a crontab, to execute every 6 hours (assuming the script with the command at /root/clean_caches.sh):

0       */6     *       *       *       /root/clean_caches.sh

Source: https://github.com/microsoft/WSL/issues/4166