Thanks for the feedback @mstormi, I increased it to 900mb and here is the printout:
%Cpu(s): 1.2 us, 0.2 sy, 0.0 ni, 98.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 1000180 total, 34220 free, 677208 used, 288752 buff/cache
KiB Swap: 102396 total, 100860 free, 1536 used. 259096 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
541 olad 20 0 362828 318180 17256 S 3.0 31.8 46:38.26 olad
1224 openhab 20 0 752148 318848 11348 S 2.0 31.9 81:56.28 java
20584 openhab+ 20 0 9732 3288 2780 R 1.0 0.3 0:00.94 top
394 mosquit+ 20 0 6356 4244 3812 S 0.3 0.4 0:53.14 mosquitto
672 root 20 0 28648 5472 4072 S 0.3 0.5 0:19.62 nmbd
1 root 20 0 27088 6064 4808 S 0.0 0.6 0:05.69 systemd
Will let you guys know when it will crash again… @NCO which version of the netatmo binding are you using?