The following metrics are not filtered even if mentioned in --exclude list. These metrics generating too many records in case of larger clusters. For example, a cluster of 250 nodes with 150 keyspaces resulting 37500 metrics.

cassandra_keyspace_effective_ownership_ratio
cassandra_token_ownership_ratio
cassandra_jvm_gc_estimated_collection_duration_seconds_total
cassandra_jvm_nio_buffer_pool_estimated_buffers

StorageServiceMBeanMetricFamilyCollector is the source of the first two metrics, is there any reason for not filtering it? If not, I will do code change to filter the metrics and raise a PR.