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.
Best Answer
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
Press
Alt-F2
, typegksudo 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
*
or*/5
instead of*/15
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
1835
.