Impala Query 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".
| Metric Name | Description | Unit | Parents | CDH Version |
|---|---|---|---|---|
| memory_usage | Memory Usage | bytes | n/a | |
| thread_usage | The number of threads in use | threads | n/a |