Settings dynamically configured with the vmq-admin set command will be reset by vernemq.conf upon broker restart.
Setting a value for the local node
Let's change the max_client_id_size as an example. (We might have noticed that some clients can't login because their client ID is too long, but we don't want to restart the broker for that). Note that you can also set multiple values with the same command.
vmq-admin set max_client_id_size=45
Setting a value for an arbitrary cluster node
vmq-admin set max_client_id_size=45 --node=VerneMQ20@192.168.1.20
Setting a value for all cluster nodes
vmq-admin set max_client_id_size=45 --all
Show current VerneMQ config values
For the local node
You can show one or multiple values in a simple table: