After the system starts, in a few minutes my memory cache fills up and it starts using the swap. Here's a screenshot of /proc/meminfo.
However, if I can disable this process / clean the cache once after that, I think my system will speed up to some extent. Correct me if I am wrong here.
I have also tried Bleachbit memory cleaning, but it doesn't seem to clean the memory cache properly. Also, the feature is still in an experimental stage.
There was already a similar question posted here: How can I disable the prefetch cache?, but it was regarding Ubuntu Server, and also the answers involved manual settings etc.
So, I want to know if there's some software for disabling/enabling Memory Cache for Ubuntu 12.04.
After the above note, if you still feel "cleaning" the cache could help, you can certainly try: it's a one-liner from the terminal:
There's no easy way to disable the cache, but you can achieve the same effect by cleaning it as often as every minute, if you want to:
Make it a cron-job
gksudo gedit /etc/crontab, and add this line near the bottom:
*/15 * * * * root sync && echo 3 > /proc/sys/vm/drop_caches
This cleans every 15 minutes. You can set to 1 or 5 minutes if you really want to by changing the first parameter to
One liner to know REAL free RAM, excepting cache
Geirha's answer explains the details, but in short, you get the number of free megabytes with:
which on my 2GB command-line server returns an extremely health