grpc_server_handling_seconds Histogram

[almex-m-bulbul]

No grpc_server_handling_seconds metrics found when enable_handling_time_histogram has been set to True.

CODE:

interceptor = PromServerInterceptor(enable_handling_time_histogram=True)

server = grpc.server(
        futures.ThreadPoolExecutor(max_workers=max_workers),
        interceptors=(interceptor,))
start_http_server(metrics_port)

OUTPUT:

# HELP python_gc_objects_collected_total Objects collected during gc
# TYPE python_gc_objects_collected_total counter
python_gc_objects_collected_total{generation="0"} 348.0
python_gc_objects_collected_total{generation="1"} 449.0
python_gc_objects_collected_total{generation="2"} 10.0
# HELP python_gc_objects_uncollectable_total Uncollectable object found during GC
# TYPE python_gc_objects_uncollectable_total counter
python_gc_objects_uncollectable_total{generation="0"} 0.0
python_gc_objects_uncollectable_total{generation="1"} 0.0
python_gc_objects_uncollectable_total{generation="2"} 0.0
# HELP python_gc_collections_total Number of times this generation was collected
# TYPE python_gc_collections_total counter
python_gc_collections_total{generation="0"} 141.0
python_gc_collections_total{generation="1"} 12.0
python_gc_collections_total{generation="2"} 1.0
# HELP python_info Python platform information
# TYPE python_info gauge
python_info{implementation="CPython",major="3",minor="6",patchlevel="9",version="3.6.9"} 1.0
# HELP process_virtual_memory_bytes Virtual memory size in bytes.
# TYPE process_virtual_memory_bytes gauge
process_virtual_memory_bytes 9.11884288e+08
# HELP process_resident_memory_bytes Resident memory size in bytes.
# TYPE process_resident_memory_bytes gauge
process_resident_memory_bytes 8.0941056e+07
# HELP process_start_time_seconds Start time of the process since unix epoch in seconds.
# TYPE process_start_time_seconds gauge
process_start_time_seconds 1.66564437377e+09
# HELP process_cpu_seconds_total Total user and system CPU time spent in seconds.
# TYPE process_cpu_seconds_total counter
process_cpu_seconds_total 0.56
# HELP process_open_fds Number of open file descriptors.
# TYPE process_open_fds gauge
process_open_fds 15.0
# HELP process_max_fds Maximum number of open file descriptors.
# TYPE process_max_fds gauge
process_max_fds 1.048576e+06
# HELP grpc_server_handled_total Total number of RPCs completed on the server, regardless of success or failure.
# TYPE grpc_server_handled_total counter
# HELP grpc_server_started_total Total number of RPCs started on the server.
# TYPE grpc_server_started_total counter
# HELP grpc_server_msg_received_total Total number of RPC stream messages received on the server.
# TYPE grpc_server_msg_received_total counter
# HELP grpc_server_msg_sent_total Total number of gRPC stream messages sent by the server.
# TYPE grpc_server_msg_sent_total counter
# HELP grpc_server_handling_seconds Histogram of response latency (seconds) of gRPC that had been application-level handled by the server.
# TYPE grpc_server_handling_seconds histogram