Impala Metrics
In addition to these base metrics, many aggregate metrics are available. If an entity type has parents defined, you can formulate all possible aggregate metrics using the formula base_metric_across_parents.
In addition, metrics for aggregate totals can be formed by adding the prefix total_ to the front of the metric name.
Use the type-ahead feature in the Cloudera Manager chart browser to find the exact aggregate metric name, in case the plural form does not end in "s".
For example, the following metric names may be valid for Impala:
- alerts_rate_across_clusters
- total_alerts_rate_across_clusters
Some metrics, such as alerts_rate, apply to nearly every metric context. Others only apply to a certain service or role.
For more information about metrics, see Cloudera Manager Metrics and Metric Aggregation.
| Metric Name | Description | Unit | Parents | CDH Version |
|---|---|---|---|---|
| alerts_rate | The number of alerts. | events per second | cluster | CDH 4, CDH 5 |
| events_critical_rate | The number of critical events. | events per second | cluster | CDH 4, CDH 5 |
| events_important_rate | The number of important events. | events per second | cluster | CDH 4, CDH 5 |
| events_informational_rate | The number of informational events. | events per second | cluster | CDH 4, CDH 5 |
| health_bad_rate | Percentage of Time with Bad Health | seconds per second | cluster | CDH 4, CDH 5 |
| health_concerning_rate | Percentage of Time with Concerning Health | seconds per second | cluster | CDH 4, CDH 5 |
| health_disabled_rate | Percentage of Time with Disabled Health | seconds per second | cluster | CDH 4, CDH 5 |
| health_good_rate | Percentage of Time with Good Health | seconds per second | cluster | CDH 4, CDH 5 |
| health_unknown_rate | Percentage of Time with Unknown Health | seconds per second | cluster | CDH 4, CDH 5 |
| impala_query_bytes_streamed_rate | The total number of bytes sent between Impala Daemons while processing this query. Called 'bytes_streamed' in searches. | bytes per second | CDH 4, CDH 5 | |
| impala_query_cm_cpu_milliseconds_rate | impala.analysis.cm_cpu_milliseconds.description | ms per second | CDH 4, CDH 5 | |
| impala_query_hdfs_bytes_read_rate | The total number of bytes read from HDFS by this query. Called 'hdfs_bytes_read' in searches. | bytes per second | CDH 4, CDH 5 | |
| impala_query_hdfs_bytes_written_rate | The total number of bytes written to HDFS by this query. Called 'hdfs_bytes_written' in searches. | bytes per second | CDH 4, CDH 5 | |
| impala_query_query_duration_rate | The duration of the query in milliseconds. Called 'query_duration' in searches. | ms per second | CDH 4, CDH 5 | |
| impala_query_thread_cpu_time_rate | The sum of the CPU time used by all threads of the query. Called 'thread_cpu_time' in searches. | ms per second | CDH 4, CDH 5 | |
| queries_ingested_rate | Impala queries ingested by the Service Monitor | queries per second | cluster | CDH 4, CDH 5 |