Impala Pool Metrics

Reference information for 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.

impala_query_admission_wait_rate

Description
The time from submission for admission to its completion. Called 'admission_wait' in searches.
Unit
ms per second
Parents
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

impala_query_bytes_streamed_rate

Description
The total number of bytes sent between Impala Daemons while processing this query. Called 'bytes_streamed' in searches.
Unit
bytes per second
Parents
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

impala_query_cm_cpu_milliseconds_rate

Description
impala.analysis.cm_cpu_milliseconds.description
Unit
ms per second
Parents
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

impala_query_hdfs_bytes_read_rate

Description
The total number of bytes read from HDFS by this query. Called 'hdfs_bytes_read' in searches.
Unit
bytes per second
Parents
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

impala_query_hdfs_bytes_written_rate

Description
The total number of bytes written to HDFS by this query. Called 'hdfs_bytes_written' in searches.
Unit
bytes per second
Parents
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

impala_query_memory_accrual_rate

Description
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.
Unit
byte seconds per second
Parents
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

impala_query_memory_spilled_rate

Description
Amount of memory spilled to disk. Called 'memory_spilled' in searches.
Unit
bytes per second
Parents
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

impala_query_query_duration_rate

Description
The duration of the query in milliseconds. Called 'query_duration' in searches.
Unit
ms per second
Parents
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

impala_query_thread_cpu_time_rate

Description
The sum of the CPU time used by all threads of the query. Called 'thread_cpu_time' in searches.
Unit
ms per second
Parents
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

queries_ingested_rate

Description
Impala queries ingested by the Service Monitor
Unit
queries per second
Parents
cluster, impala
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

queries_oom_rate

Description
Impala queries for which memory consumption exceeded what was allowed
Unit
queries per second
Parents
cluster, impala
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

queries_rejected_rate

Description
Impala queries rejected from admission, commonly due to the queue being full or insufficient memory
Unit
queries per second
Parents
cluster, impala
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

queries_spilled_memory_rate

Description
Impala queries that spilled to disk
Unit
queries per second
Parents
cluster, impala
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

queries_successful_rate

Description
Impala queries that ran to completion successfully
Unit
queries per second
Parents
cluster, impala
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)

queries_timed_out_rate

Description
Impala queries that timed out waiting in queue during admission
Unit
queries per second
Parents
cluster, impala
CDH Version
[CDH 5.0.0..CDH 5.7.0), [CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)