Just setup a new R Pi 2B+, using raspbian on a 16gb sd card, ethernet, USB mouse/keyboard and HDMI out.

Finding it extremely slow - the UI is reasonably responsive however installing monodevelop took about two hours. CPU and ram stay around 5% with peak about 30%. I was able to start a C# GUI project in monodevelop and run it without any issues which was nice.

SD card is getting a lot of access when I would expect it to be using far more ram, but its also slow when not accessing SD.

Browser is almost unusable (with one OR many tabs, default or Iceweasel), but cpu/ram are empty. Process memory usage is higher than the total used in ram, which is almost empty.

Would like to know if theres a better performance/task monitor app which can show all 4 cores, set affinity, memory and swap usage etc..?

Ive searched other questions about slowness but could not see any that are related to low cpu usage and empty ram.


  • I'd use top for monitoring CPU / memory usage.
    – user236012
    Commented Mar 10, 2015 at 14:20
  • 2
    You don't say what you are comparing the speeds against.
    – joan
    Commented Mar 10, 2015 at 14:24
  • What is your network connection like. Commented Mar 10, 2015 at 14:25
  • Network is good, it was quite fast downloading the packages for monodevelop, just installing took ages. Ive not used a Pi before but I assume it should be as fast as an equally or lesser specced old phone, for example a ZTE Blade.
    – Kram
    Commented Mar 10, 2015 at 14:45
  • 1
    @user236012 Unless the OP is grotesquely exaggerating, it shouldn't be like this regardless. If your car is not running properly, it may still go faster on a paved highway but that does not solve the problem.
    – goldilocks
    Commented Mar 10, 2015 at 16:43

3 Answers 3


A totally obvious solution I'm afraid, have you expanded the file system? You can do this on Raspbian by running

sudo raspi-config

As I said, it's fairly obvious but easily overlooked and would give you exactly the issue you're facing

  • This should normally go into a comment... but seeing that I believe you need 15 rep to post a comment it's alright. Remember next time!
    – Kachamenus
    Commented Nov 8, 2015 at 18:28

Maybe the sd-card is of a low class, that would fit together with slow installations with good internet connection and good processor.


There are two highly likely scenario's here:

1) The SD card isn't fast enough

Buy a better one, class 10 with good read/write speeds

2) your power supply isn't up to the task

Get a good quality (preferably not to long) cable with a 5V 2A adapter.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.