hi, all I've enable state.backend.rocksdb.metrics.block-pinned-usage metric , and the flink_taskmanager_job_task_operator_window_contents_rocksdb_block_cache_pinned_usage metric exposed. I'm confused that the total memory used for block cache pinned is sum of flink_taskmanager_job_task_operator_window_contents_rocksdb_block_cache_pinned_usage or just flink_taskmanager_job_task_operator_window_contents_rocksdb_block_cache_pinned_usage (for block cache usage the metric seems per slot)?
