This provides the current throughput for all compactions, irrespective of the table and keyspace. This can be configured but would require a restart of Cassandra for that config to be reflected. This can also be increased using setcompactionthroughput, but it would be reset when Cassandra is restarted, so it can be used as a quick fix during issues with nodes or while bootstrapping a node:
$CASSANDRA_HOME/bin/nodetool getcompactionthroughput
The output is as follows: