Hi,

I don´t know if you are using the AstroPi3 script, but on each library that it compiles you will see something like this:

sudo -H -u $SUDO_USER make -j $(expr $(nproc) + 2)

The '-j $(expr $(nproc) + 2)' is the number of parallel jobs you want to use to compile. In this case it use number of processors + 2. If you don´t have enough RAM you can remove '--j $(expr $(nproc) + 2)' and use only one job. It will reduce the use of RAM but also will increase the time, because you will only use a process...

I was able to compile with a RPi3 1GB, but Kstars worked very slow and I had problem to handle big images. Now, I´m using a RPi4 8GB and it works pretty well. I don´t know how it will work with 2GB, I suppose a bit better than me.

Regards.

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