[jira] [Created] (NIFI-9760) PrometheusReportingTask: should at least expose all the info in nifi-api/system-diagnostics

["Ruben Laguna (Jira)" <ji...@apache.org>]

Ruben Laguna created NIFI-9760:
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             Summary: PrometheusReportingTask: should at least expose all the info in nifi-api/system-diagnostics 
                 Key: NIFI-9760
                 URL: https://issues.apache.org/jira/browse/NIFI-9760
             Project: Apache NiFi
          Issue Type: Improvement
            Reporter: Ruben Laguna


The PrometheusReportingTask currently exposes / export the following JVM metrics: 


nifi_jvm_uptime
nifi_jvm_heap_non_usage
nifi_jvm_heap_used
nifi_jvm_gc_time
nifi_jvm_gc_runs
nifi_jvm_heap_usage
nifi_jvm_daemon_thread_count
nifi_jvm_file_descriptor_usage
nifi_jvm_thread_count

There are some notable things missing from there that are present in nifi-api/system-diagnostics


nifi_jvm_heap_free
nifi_jvm_heap_max
nifi_jvm_heap_total



Also other non JVM stuff is missing (that is present in system diagnostics) 

* contentRepositoryStorageUsage
* provenanceRepositoryStorageUsage
* flowFileRepositoryStorageUsage



I would be good to expose the same information in both places (it's a little surprising for a newcomer that some information is in prometheus, some other in system-diagnostics, etc) 


Also it would be great to also expose all the jvm stuff under more conventional metric names like

- java_lang_memory_heapmemoryusage_used
- java_lang_memory_heapmemoryusage_committed
- java_lang_operatingsystem_openfiledescriptorcount
- java_lang_operatingsystem_maxfiledescriptorcount
- java_lang_operatingsystem_freephysicalmemorysize
- java_lang_operatingsystem_freeswapspacesize
- java_lang_threading_threadcount
- java_lang_threading_daemonthreadcount
- java_lang_classloading_loadedclasscount
- java_lang_garbagecollector_collectiontime_copy
- java_lang_garbagecollector_collectiontime_ps_scavenge
- java_lang_garbagecollector_collectiontime_parnew
- java_lang_garbagecollector_collectiontime_marksweepcompact
- java_lang_garbagecollector_collectiontime_ps_marksweep
- java_lang_garbagecollector_collectiontime_concurrentmarksweep
- java_lang_garbagecollector_collectiontime_g1_young_generation
- java_lang_garbagecollector_collectiontime_g1_old_generation
- java_lang_garbagecollector_collectiontime_g1_mixed_generation
- java_lang_operatingsystem_committedvirtualmemorysize






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