THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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In addition to the Counter & Timer metrics collected from EclipseLink, a computed metric of Timer/Counter (divided by) is also sent. This metrics provides the average time taken for an operation across time.
For example, if
Counter Metric : Counter.ReadAllQuery.HostRoleCommandEntity = 10000
Timer Metric : Timer.ReadAllQuery.HostRoleCommandEntity = 50
Computed Metric (Avg time for the operation) : ReadAllQuery.HostRoleCommandEntity = 200 (10000 div by 50)
As seen above, the computed metric name will be the same as the Timer & Counter metric except without the 'Timer.' / 'Counter.' prefix.
To enable this source, add "database" to the metric.sources config in metrics.properties and restart Ambari Server.
Configs
| Config Name | Default Value | Explanation |
|---|---|---|
source.database.class | org.apache.ambari.server.metrics.system.impl.DatabaseMetricsSource | Class used to collect Database Metrics from extended Performance Monitor class - org.apache.ambari.server.metrics.system.impl.AmbariPerformanceMonitor. |
source.database.performance.monitor.query.weight | HEAVY | EclipseLink Performance monitor granularity : NONE / NORMAL / HEAVY / ALL |
source.database.monitor.dumptime | 60000 | Collection interval in milliseconds |
source.database.monitor.entities | Cluster(.*)Entity,Host(.*)Entity,ExecutionCommandEntity, ServiceComponentDesiredStateEntity,Alert(.*)Entity,StackEntity,StageEntity | Only these entities' metrics will be collected and tracked. (org.apache.ambari.server.orm.entities). |
source.database.monitor.query.keywords.include | CacheMisses | Include some metrics which have the keyword even if they are not part of requested Entities. |
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