Impala Pool 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 Pool:
- queries_ingested_rate_across_clusters
- total_queries_ingested_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 |
|---|---|---|---|---|
| impala_query_admission_wait_rate | The time from submission for admission to completion of admission. Called 'admission_wait' in searches. | ms per second | 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_memory_accrual_rate | The total accrued memory usage by the query. This is computed by multiplying the average aggregate memory usage of the query by the query's duration. Called 'memory_accrual' in searches. | byte seconds per second | CDH 4, CDH 5 | |
| impala_query_memory_spilled_rate | Amount of memory spilled to disk. Called 'memory_spilled' 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, impala | CDH 4, CDH 5 |
| queries_oom_rate | Impala queries whose memory consumption exceeded what was allowed | queries per second | cluster, impala | CDH 4, CDH 5 |
| queries_rejected_rate | Impala queries rejected from admission, commonly due to the queue being full, or insufficient memory | queries per second | cluster, impala | CDH 4, CDH 5 |
| queries_successful_rate | Impala queries that ran to completion successfully | queries per second | cluster, impala | CDH 4, CDH 5 |
| queries_timed_out_rate | Impala queries that timed out during admission waiting in queue | queries per second | cluster, impala | CDH 4, CDH 5 |