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https://issues.apache.org/jira/browse/AMBARI-6070?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmytro Sen resolved AMBARI-6070.
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Resolution: Fixed
Committed to trunk
> Call to fetch metrics takes over 20 seconds
> -------------------------------------------
>
> Key: AMBARI-6070
> URL: https://issues.apache.org/jira/browse/AMBARI-6070
> Project: Ambari
> Issue Type: Improvement
> Components: controller
> Affects Versions: 1.6.0
> Reporter: Siddharth Wagle
> Assignee: Dmytro Sen
> Fix For: 1.6.1
>
>
> CPU is consumed by NagiosPropertyProvider and JMXPropertyProvider.
> For JMXPropertyProvider execution of ConfigHelper.isStaleConfigs() takes
> 10-15% of the time now. isStale could be easily cached with Guava Cache.
> isStale may be changed in 4 cases:
> 1. Configuration change
> 2. ConfigGroup created/deleted
> 3. Start/restart report receiving
> 4. Host registeration
> So we could invalidate appropriate recorrd in cache in these points
> *API call*:
> {code}
> http://<server>:8080/api/v1/clusters/c1/components/?ServiceComponentInfo/category=MASTER&fields=ServiceComponentInfo/Version,ServiceComponentInfo/StartTime,ServiceComponentInfo/HeapMemoryUsed,ServiceComponentInfo/HeapMemoryMax,ServiceComponentInfo/service_name,host_components/HostRoles/host_name,host_components/HostRoles/state,host_components/HostRoles/maintenance_state,host_components/HostRoles/stale_configs,host_components/metrics/jvm/memHeapUsedM,host_components/metrics/jvm/HeapMemoryMax,host_components/metrics/jvm/HeapMemoryUsed,host_components/metrics/jvm/memHeapCommittedM,host_components/metrics/mapred/jobtracker/trackers_decommissioned,host_components/metrics/cpu/cpu_wio,host_components/metrics/rpc/RpcQueueTime_avg_time,host_components/metrics/dfs/FSNamesystem/*,host_components/metrics/dfs/namenode/Version,host_components/metrics/dfs/namenode/DecomNodes,host_components/metrics/dfs/namenode/TotalFiles,host_components/metrics/dfs/namenode/UpgradeFinalized,host_components/metrics/dfs/namenode/Safemode,host_components/metrics/runtime/StartTime,host_components/metrics/hbase/master/IsActiveMaster,ServiceComponentInfo/MasterStartTime,ServiceComponentInfo/MasterActiveTime,ServiceComponentInfo/AverageLoad,ServiceComponentInfo/Revision,ServiceComponentInfo/RegionsInTransition,metrics/api/cluster/summary,,host_components/metrics/yarn/Queue,ServiceComponentInfo/rm_metrics/cluster/activeNMcount,ServiceComponentInfo/rm_metrics/cluster/unhealthyNMcount,ServiceComponentInfo/rm_metrics/cluster/rebootedNMcount,ServiceComponentInfo/rm_metrics/cluster/decommissionedNMcount&minimal_response=true&_=1400808845240
> {code}
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