[GitHub] [incubator-pegasus] empiredan opened a new issue, #1321: Feature(new_metrics): collect built-in metrics

[GitBox <gi...@apache.org>]

empiredan opened a new issue, #1321:
URL: https://github.com/apache/incubator-pegasus/issues/1321

   In the framework of `perf_counters`, built-in metrics are actually two metrics:
   
   - *memused.res(MB)*, the usage of physical memory
   - *memused.virt(MB)*, the size of virtual memory
   
   They are collected in a timer each `FLAGS_perf_counter_update_interval_seconds` (typically 10 seconds).
   
   In the framework of new metrics, we can also introduce the built-in metrics. During `start()` for both `pegasus_replication_service_app` and `pegasus_meta_service_app`, a timer will be launched to collect built-in metrics periodically. The built-in metrics will be attached to *server* entity, which is defined in `metrics.cpp`.
   


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