/streamz help
Streamz Root:
Streamz ManuallySampledMetrics set:
Root name: <default> [(+) labels] [(+) collection] [(+) largest exported metrics]
Search:

Directory: /perftools/tracing

Query matched 3 metrics and 1 "subdirectories":
/perftools/tracing/background/ (1 metrics)
/perftools/tracing/bucketed-sampling-count{string family, string method, bool sampled, bool speculative} (cumulative): long = ...
/perftools/tracing/threaded_trace_logger_dropped_pending_messages_size (cumulative): long = 0 bytes
/perftools/tracing/trace_record_count{string logger, bool sampled, bool speculative, string name} (cumulative): long = ...