Improve metrics log #4297
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Improve metrics log #4297
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Pull request overview
This PR improves the clarity of metrics logging by:
- Renaming metrics methods and fields for better clarity (increment→increase, finished→completed)
- Adding tracking for API-level request states (running/waiting at the API server level)
- Reorganizing the log output to clearly separate API server metrics from engine core metrics
- Making the prefix cache hit rate conditional in the output (only shown when non-zero)
Changes:
- Renamed metrics methods from
increment_*toincrease_*andnum_finished_reqstonum_completed_reqs - Added
num_api_running_reqsandnum_api_waiting_reqstracking to distinguish API-level from engine-level request states - Improved log message format to show API server and Engine core metrics separately with clearer labels
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| lmdeploy/serve/async_engine.py | Updated to track API-level running requests in the model_inst context manager and use renamed metrics methods |
| lmdeploy/metrics/stats.py | Added new fields for API-level request tracking and updated documentation to explain the metric relationships |
| lmdeploy/metrics/metrics_processor.py | Renamed methods and added increase/decrease methods for API running requests tracking |
| lmdeploy/metrics/loggers.py | Reorganized log output format, made prefix cache conditional, and updated Prometheus metric names |
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lvhan028
reviewed
Feb 5, 2026
lmdeploy/metrics/stats.py
Outdated
| num_total_reqs: API server, the number of all requests received since server start. | ||
| num_completed_reqs: API server, the number of successfully completed requests since server start. | ||
| num_api_running_reqs: API server, the number of requests being assigned to engine instances. | ||
| num_api_waiting_reqs: API server, the number of requests waiting for free engine instances. |
Collaborator
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num_api_routed_reqs: API server, the number of requests routed to request handles.
num_api_waiting_reqs: API server, the number of requests waiting for free request handles.
lvhan028
reviewed
Feb 5, 2026
lmdeploy/metrics/stats.py
Outdated
| num_total_reqs: int = 0 | ||
| num_finished_reqs: int = 0 | ||
| num_completed_reqs: int = 0 | ||
| num_api_running_reqs: int = 0 |
Collaborator
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num_api_routed_reqs: int = 0
Collaborator
|
May merge latest main to resolve the conflicts |
lvhan028
approved these changes
Feb 5, 2026
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Try to make the metrics log clearer. Now, it looks like: