I have a plot with a lot of measurement datapoints. I exported this plot from Matlab2tikz.
When I tried to compile, it said that the memory was exceeded. I found this question and it tells me that I can export different tikzpictures to different files. Unfortunately, this didn't help me since I have only 1 tikzpicture causing the problem.
So I actually tried to increase the memory of TeX. I went to
/usr/share/texlive/texmf/web2c then in
texmf.cnf I changed
main_memory = 3000000 to
main_memory = 5000000. Then I ran
texhash and tried to compile my TeX file again.
My problem is that after I increased the memory limit I got again the same error:
! TeX capacity exceeded, sorry [main memory size=3000000]. However I just changed it to
5000000. I presume that I did something wrong when increasing the memory limit. Did I?
Eventually I just used lualatex. This was due to the fact that I think there is something wrong with my texlive install: it is installed twice on my system for some reason. I think, however, that Heiko Oberdiek's answer is correct and hence marked it as the correct answer.