Siyao Meng created HDDS-17168:
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Summary: Expose datanode gRPC server thread pool utilization and
request queue length
Key: HDDS-17168
URL: https://issues.apache.org/jira/browse/HDDS-17168
Project: Apache Ozone
Issue Type: Improvement
Components: metrics, Ozone Datanode
Reporter: Siyao Meng
XceiverServerGrpc runs on a Netty event loop group plus the ChunkReader
ThreadPoolExecutor, but neither is visible in metrics. When reads slow down it
is not possible to tell whether the datanode is saturated on request handling
threads or on disk.
Expose for the datanode gRPC server:
* Active and maximum threads of the read executor.
* Read executor queue length.
* Number of active client connections.
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