Add note on gauge.set_function not working with multiprocessing by aapeliv · Pull Request #1098 · prometheus/client_python
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@@ -14,6 +14,7 @@ This comes with a number of limitations:
- Registering metrics to a registry later used by a `MultiProcessCollector`
may cause duplicate metrics to be exported
- Custom collectors do not work (e.g. cpu and memory metrics)
- Gauges cannot use `set_function`
- Info and Enum metrics do not work
- The pushgateway cannot be used
- Gauges cannot use the `pid` label
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