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.
| Metric Name | Description | Unit | Parents | Version |
|---|---|---|---|---|
| impala_query_admission_wait_rate | The time from submission for admission to its completion. Called 'admission_wait' in searches. | ms per second | CDH 5, CDH 6, Cloudera Runtime 7 | |
| 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 5, CDH 6, Cloudera Runtime 7 | |
| impala_query_cm_cpu_milliseconds_rate | impala.analysis.cm_cpu_milliseconds.description | ms per second | CDH 5, CDH 6, Cloudera Runtime 7 | |
| 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 5, CDH 6, Cloudera Runtime 7 | |
| 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 5, CDH 6, Cloudera Runtime 7 | |
| 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 5, CDH 6, Cloudera Runtime 7 | |
| impala_query_memory_spilled_rate | Amount of memory spilled to disk. Called 'memory_spilled' in searches. | bytes per second | CDH 5, CDH 6, Cloudera Runtime 7 | |
| impala_query_query_duration_rate | The duration of the query in milliseconds. Called 'query_duration' in searches. | ms per second | CDH 5, CDH 6, Cloudera Runtime 7 | |
| 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 5, CDH 6, Cloudera Runtime 7 | |
| queries_ingested_rate | Impala queries ingested by the Service Monitor | queries per second | cluster, impala | CDH 5, CDH 6, Cloudera Runtime 7 |
| queries_oom_rate | Impala queries for which memory consumption exceeded what was allowed | queries per second | cluster, impala | CDH 5, CDH 6, Cloudera Runtime 7 |
| queries_rejected_rate | Impala queries rejected from admission, commonly due to the queue being full or insufficient memory | queries per second | cluster, impala | CDH 5, CDH 6, Cloudera Runtime 7 |
| queries_spilled_memory_rate | Impala queries that spilled to disk | queries per second | cluster, impala | CDH 5, CDH 6, Cloudera Runtime 7 |
| queries_successful_rate | Impala queries that ran to completion successfully | queries per second | cluster, impala | CDH 5, CDH 6, Cloudera Runtime 7 |
| queries_timed_out_rate | Impala queries that timed out waiting in queue during admission | queries per second | cluster, impala | CDH 5, CDH 6, Cloudera Runtime 7 |
