Configure certificate based login to the Karaf console. Security (create the ssh key pair, create an entry in /var/lib/openhab2/etc/keys.properties
`openhab=<id_rsa.pub key>,_g_:admingroup`
NOTE: The corresponding private key needs to be stored in the .ssh folder of the user that will be executing the command(s). If you will run this from openHAB it needs to be stored in ~openhab/.ssh.
# Current heap size
ssh -p 8101 openhab@localhost shell:info | grep 'Current heap' | cut -d ' ' -f 16
# Maximum heap size
ssh -p 8101 openhab@localhost shell:info | grep 'Maximum heap' | cut -d -f 16
# Committed heap size
ssh -p 8101 openhab@localhost shell:info | grep 'Committed heap' | cut -d -f 14
Run these commands from a Rule that updates openHAB Items that get persisted, or update OH Items using curl from a cron triggered script, or save the values directly into a database using your database's API.