So I want to run Elasticsearch on a very limited memory machine and I keep running on this error:
cannot allocate memory.
Did some research and found this docs on increasing
echo "vm.max_map_count=262144" | sudo tee -a /etc/sysctl.conf sudo sysctl -w vm.max_map_count=262144
But the problem still persist, turns out memory still actually still not enough. I want don't to upgrade the memory since I just want to test things out and I have no plan on running it on production.
Swap memory to the rescue.
fallocate -l 2G /swapfile chmod 600 /swapfile mkswap /swapfile swapon /swapfile echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
Run your elasticsearch and it should now be good.
Small Rant: I don't get why we need more than 2GB of memory to just test ES.