Cloudera Docs

Impala Daemon Metrics

Reference information for Impala Daemon 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 Daemon:

  • assignments_rate_across_clusters
  • total_assignments_rate_across_clusters

Some metrics, such as alerts_rate, apply to nearly every metric context. Others only apply to a certain service or role.

assignments_rate

Description
The number of assignments
Unit
assignments per second
Parents
cluster, impala, rack
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)

audit_agent_bytes_left_rate

Description
Number of bytes of audit events still to be sent to the Audit Server.
Unit
bytes per second
Parents
cluster, impala, rack
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)

audit_agent_bytes_sent_rate

Description
Number of bytes of audit events successfully sent by Cloudera Manager Agent to the Audit Server.
Unit
bytes per second
Parents
cluster, impala, rack
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)

audit_agent_events_sent_rate

Description
Number of audit events successfully sent by Cloudera Manager Agent to the Audit Server.
Unit
events per second
Parents
cluster, impala, rack
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)

audit_agent_send_failures_rate

Description
Number of time Cloudera Manager Agent encountered failure when sending audit event(s) to the Audit Server.
Unit
errors per second
Parents
cluster, impala, rack
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)

audit_plugin_coalesced_rate

Description
Number of audit events coalesced
Unit
events per second
Parents
cluster, impala, rack
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)

audit_plugin_events_rate

Description
Number of audit events persisted to local filesystem
Unit
events per second
Parents
cluster, impala, rack
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)

audit_plugin_exceptions_rate

Description
Number of exception encountered when processing audit events
Unit
errors per second
Parents
cluster, impala, rack
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)

audit_plugin_filtered_rate

Description
Number of audit events that were filtered based on user specified criteria
Unit
events per second
Parents
cluster, impala, rack
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)

audit_plugin_parse_errors_rate

Description
Number of audit events that cannot be parsed
Unit
errors per second
Parents
cluster, impala, rack
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)

backends_client_cache_clients_in_use

Description
The number of active Impala Backend clients. These clients are for communication with other Impala Daemons.
Unit
clients
Parents
cluster, impala, rack
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)

backends_client_cache_total_clients

Description
The total number of Impala Backend clients in this Impala Daemon's client cache. These clients are for communication with other Impala Daemons.
Unit
clients
Parents
cluster, impala, rack
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)

catalog_num_databases

Description
The number of databases in the catalog.
Unit
databases
Parents
cluster, impala, rack
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)

catalog_num_tables

Description
The number of tables in the catalog.
Unit
table
Parents
cluster, impala, rack
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)

completed_query_monitoring_failure_rate

Description
The number of failures encountered by Cloudera Manager Agent when monitoring completed queries.
Unit
failures per second
Parents
cluster, impala, rack
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)

executing_query_monitoring_failure_rate

Description
The number of failures encountered by Cloudera Manager Agent when monitoring executing queries.
Unit
failures per second
Parents
cluster, impala, rack
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)

hash_table_total_bytes

Description
The current size of all allocated hash tables.
Unit
bytes
Parents
cluster, impala, rack
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)

io_mgr_num_buffers

Description
The number of allocated IO buffers. IO buffers are shared by all queries.
Unit
buffers
Parents
cluster, impala, rack
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)

io_mgr_num_open_files

Description
The current number of files opened by the IO Manager
Unit
files
Parents
cluster, impala, rack
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)

io_mgr_num_unused_buffers

Description
The number of unused IO buffers. IO buffers are shared by all queries.
Unit
buffers
Parents
cluster, impala, rack
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)

io_mgr_total_bytes

Description
Number of bytes used by IO buffers (used and unused).
Unit
bytes
Parents
cluster, impala, rack
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)

local_assignments_rate

Description
Number of assignments operating on local data
Unit
assignments per second
Parents
cluster, impala, rack
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)

mem_pool_total_bytes

Description
The current size of the memory pool shared by all queries
Unit
bytes
Parents
cluster, impala, rack
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)

mem_tracker_process_bytes_freed_by_last_gc

Description
The amount of memory freed by the last memory tracker garbage collection.
Unit
bytes
Parents
cluster, impala, rack
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)

mem_tracker_process_bytes_over_limit

Description
The amount of memory by which the process was over its memory limit the last time the memory limit was encountered.
Unit
bytes
Parents
cluster, impala, rack
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)

mem_tracker_process_limit

Description
The total amount of memory available to the memory tracker over the life of the process.
Unit
bytes
Parents
cluster, impala, rack
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)

mem_tracker_process_num_gcs_rate

Description
The total number of garbage collections performed by the memory tracker over the life of the process.
Unit
garbage collections per second
Parents
cluster, impala, rack
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)

num_backends

Description
The number of backend connections from this Impala Daemon to other Impala Daemons.
Unit
backends
Parents
cluster, impala, rack
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)

num_files_open_for_insert

Description
The number of HDFS files currently open for writing.
Unit
files
Parents
cluster, impala, rack
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)

num_fragments_rate

Description
The total number of query fragments processed over the life of the process
Unit
query fragments per second
Parents
cluster, impala, rack
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)

num_open_beeswax_sessions

Description
The number of open Beeswax sessions.
Unit
sessions
Parents
cluster, impala, rack
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)

num_open_hiveserver2_sessions

Description
The number of open HiveServer2 sessions.
Unit
sessions
Parents
cluster, impala, rack
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)

num_queries_expired_rate

Description
Number of queries expired due to inactivity.
Unit
queries per second
Parents
cluster, impala, rack
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)

num_queries_rate

Description
The total number of queries processed over the life of the process
Unit
queries per second
Parents
cluster, impala, rack
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)

num_sessions_expired_rate

Description
Number of sessions expired due to inactivity.
Unit
sessions per second
Parents
cluster, impala, rack
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)

scan_ranges_num_missing_volume_id_rate

Description
The total number of scan ranges read over the life of the process that did not have volume metadata
Unit
scan ranges per second
Parents
cluster, impala, rack
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)

scan_ranges_rate

Description
The total number of scan ranges read over the life of the process
Unit
scan ranges per second
Parents
cluster, impala, rack
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)

statestore_subscriber_heartbeat_interval_time_last

Description
The most recent interval between heartbeats from this Impala Daemon to the StateStore.
Unit
seconds
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)

statestore_subscriber_heartbeat_interval_time_max

Description
The maximum interval between heartbeats from this Impala Daemon to the StateStore. This is calculated over the lifetime of the Impala Daemon.
Unit
seconds
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)

statestore_subscriber_heartbeat_interval_time_mean

Description
The average interval between heartbeats from this Impala Daemon to the StateStore. This is calculated over the lifetime of the Impala Daemon.
Unit
seconds
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)

statestore_subscriber_heartbeat_interval_time_min

Description
The minimum interval between heartbeats from this Impala Daemon to the StateStore. This is calculated over the lifetime of the Impala Daemon.
Unit
seconds
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)

statestore_subscriber_heartbeat_interval_time_rate

Description
The total number of samples taken of the Impala Daemon's StateStore heartbeat interval.
Unit
samples 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)

statestore_subscriber_heartbeat_interval_time_stddev

Description
The standard deviation in the interval between heartbeats from this Impala Daemon to the StateStore. This is calculated over the lifetime of the Impala Daemon.
Unit
seconds
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)

statestore_subscriber_last_recovery_duration

Description
The amount of time the StateStore subscriber took to recover the connection the last time it was lost.
Unit
seconds
Parents
cluster, impala, rack
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)

statestore_subscriber_statestore_client_cache_clients_in_use

Description
The number of active StateStore subscriber clients in this Impala Daemon's client cache. These clients are for communication from this role to the StateStore.
Unit
connections
Parents
cluster, impala, rack
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)

statestore_subscriber_statestore_client_cache_total_clients

Description
The total number of StateStore subscriber clients in this Impala Daemon's client cache. These clients are for communication from this role to the StateStore.
Unit
connections
Parents
cluster, impala, rack
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)

tcmalloc_bytes_in_use

Description
Number of bytes used by the application. This will not typically match the memory use reported by the OS, because it does not include TCMalloc overhead or memory fragmentation.
Unit
bytes
Parents
cluster, impala, rack
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)

tcmalloc_pageheap_free_bytes

Description
Number of bytes in free, mapped pages in page heap. These bytes can be used to fulfill allocation requests. They always count towards virtual memory usage, and unless the underlying memory is swapped out by the OS, they also count towards physical memory usage.
Unit
bytes
Parents
cluster, impala, rack
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)

tcmalloc_pageheap_unmapped_bytes

Description
Number of bytes in free, unmapped pages in page heap. These are bytes that have been released back to the OS, possibly by one of the MallocExtension "Release" calls. They can be used to fulfill allocation requests, but typically incur a page fault. They always count towards virtual memory usage, and depending on the OS, typically do not count towards physical memory usage.
Unit
bytes
Parents
cluster, impala, rack
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)

tcmalloc_physical_bytes_reserved

Description
Derived metric computing the amount of physical memory (in bytes) used by the process, including that actually in use and free bytes reserved by tcmalloc. Does not include the tcmalloc metadata.
Unit
bytes
Parents
cluster, impala, rack
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)

tcmalloc_total_bytes_reserved

Description
Bytes of system memory reserved by TCMalloc.
Unit
bytes
Parents
cluster, impala, rack
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)

thread_manager_running_threads

Description
The number of running threads in this process.
Unit
threads
Parents
cluster, impala, rack
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)

thread_manager_threads_created_rate

Description
Threads created over the lifetime of the process.
Unit
threads per second
Parents
cluster, impala, rack
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)

thrift_server_backend_connections_in_use

Description
The number of active Impala Backend client connections to this Impala Daemon.
Unit
connections
Parents
cluster, impala, rack
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)

thrift_server_backend_connections_rate

Description
The total number of Impala Backend client connections made to this Impala Daemon over its lifetime.
Unit
connections per second
Parents
cluster, impala, rack
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)

thrift_server_beeswax_frontend_connections_in_use

Description
The number of active Beeswax API connections to this Impala Daemon.
Unit
connections
Parents
cluster, impala, rack
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)

thrift_server_beeswax_frontend_connections_rate

Description
The total number of Beeswax API connections made to this Impala Daemon over its lifetime.
Unit
connections per second
Parents
cluster, impala, rack
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)

thrift_server_hiveserver2_frontend_connections_in_use

Description
The number of active HiveServer2 API connections to this Impala Daemon.
Unit
connections
Parents
cluster, impala, rack
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)

thrift_server_hiveserver2_frontend_connections_rate

Description
The total number of HiveServer2 API connections made to this Impala Daemon over its lifetime.
Unit
connections per second
Parents
cluster, impala, rack
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)

web_metrics_collection_duration

Description
Web Server Responsiveness
Unit
ms
Parents
cluster, impala, rack
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)

alerts_rate

Description
The number of alerts.
Unit
events per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cgroup_cpu_system_rate

Description
CPU usage of the role's cgroup
Unit
seconds per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cgroup_cpu_user_rate

Description
User Space CPU usage of the role's cgroup
Unit
seconds per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cgroup_mem_page_cache

Description
Page cache usage of the role's cgroup
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cgroup_mem_rss

Description
Resident memory of the role's cgroup
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cgroup_mem_swap

Description
Swap usage of the role's cgroup
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cgroup_read_bytes_rate

Description
Bytes read from all disks by the role's cgroup
Unit
bytes per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cgroup_read_ios_rate

Description
Number of read I/O operations from all disks by the role's cgroup
Unit
ios per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cgroup_write_bytes_rate

Description
Bytes written to all disks by the role's cgroup
Unit
bytes per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cgroup_write_ios_rate

Description
Number of write I/O operations to all disks by the role's cgroup
Unit
ios per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cpu_system_rate

Description
Total System CPU
Unit
seconds per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

cpu_user_rate

Description
Total CPU user time
Unit
seconds per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

events_critical_rate

Description
The number of critical events.
Unit
events per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

events_important_rate

Description
The number of important events.
Unit
events per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

events_informational_rate

Description
The number of informational events.
Unit
events per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

fd_max

Description
Maximum number of file descriptors
Unit
file descriptors
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

fd_open

Description
Open file descriptors.
Unit
file descriptors
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

health_bad_rate

Description
Percentage of Time with Bad Health
Unit
seconds per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

health_concerning_rate

Description
Percentage of Time with Concerning Health
Unit
seconds per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

health_disabled_rate

Description
Percentage of Time with Disabled Health
Unit
seconds per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

health_good_rate

Description
Percentage of Time with Good Health
Unit
seconds per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

health_unknown_rate

Description
Percentage of Time with Unknown Health
Unit
seconds per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

mem_rss

Description
Resident memory used
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

mem_swap

Description
Amount of swap memory used by this role's process.
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

mem_virtual

Description
Virtual memory used
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

oom_exits_rate

Description
The number of times the role's backing process was killed due to an OutOfMemory error. This counter is only incremented if the Cloudera Manager "Kill When Out of Memory" option is enabled.
Unit
exits per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

read_bytes_rate

Description
The number of bytes read from the device
Unit
bytes per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

unexpected_exits_rate

Description
The number of times the role's backing process exited unexpectedly.
Unit
exits per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

uptime

Description
For a host, the amount of time since the host was booted. For a role, the uptime of the backing process.
Unit
seconds
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

write_bytes_rate

Description
The number of bytes written to the device
Unit
bytes per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.0.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0), [CM -1.0.0..CM -1.0.0]

impala_backends_connection_setup_queue_size

Description
The number of connections to the Impala Backend Server that have been accepted but are awaiting setup
Unit
connections
Parents
cluster, impala, rack
CDH Version
[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_buffer_pool_clean_page_bytes

Description
Total bytes of clean page memory cached in the buffer pool
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_buffer_pool_clean_pages

Description
Total number of clean pages cached in the buffer pool
Unit
pages
Parents
cluster, impala, rack
CDH Version
[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_buffer_pool_free_buffer_bytes

Description
Total bytes of free buffer memory cached in the buffer pool
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_buffer_pool_free_buffers

Description
Total number of free buffers cached in the buffer pool
Unit
buffers
Parents
cluster, impala, rack
CDH Version
[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_buffer_pool_limit

Description
Maximum allowed bytes allocated by the buffer pool
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_buffer_pool_reserved

Description
Total bytes of buffers reserved by Impala subsystems
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_buffer_pool_system_allocated

Description
Total buffer memory currently allocated by the buffer pool
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_daemon_jvm_pauses_warn_threshold_rate

Description
JVM Pause Detection Warning Threshold Exceeded
Unit
pauses per second
Parents
cluster, impala, rack
CDH Version
[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_data_stream_service_current_usage_bytes

Description
Data Stream Service Current Usage Bytes
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_data_stream_service_peak_usage_bytes

Description
Data Stream Service Peak Usage Bytes
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_hedged_read_ops_rate

Description
The number of hedged reads that have been attempted
Unit
operations per second
Parents
cluster, impala, rack
CDH Version
[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_hedged_read_ops_win_rate

Description
The number of times the hedged read returned faster than the original read
Unit
operations per second
Parents
cluster, impala, rack
CDH Version
[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_jvm_gc_rate

Description
JVM Garbage Collection Count
Unit
garbage collections per second
Parents
cluster, impala, rack
CDH Version
[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_jvm_gc_time_rate

Description
JVM Garbage Collection Time
Unit
ms per second
Parents
cluster, impala, rack
CDH Version
[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_jvm_heap_committed_usage_bytes

Description
Jvm heap Committed Usage Bytes
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_jvm_heap_current_usage_bytes

Description
Jvm heap Current Usage Bytes
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_jvm_heap_init_usage_bytes

Description
JVM heap Init Usage Bytes
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_jvm_heap_max_usage_bytes

Description
JVM heap Max Usage Bytes
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_jvm_pause_time_rate

Description
JVM Pause Detection Extra Sleep Time
Unit
ms per second
Parents
cluster, impala, rack
CDH Version
[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_jvm_pauses_info_threshold_rate

Description
JVM Pause Detection Info Threshold Exceeded
Unit
pauses per second
Parents
cluster, impala, rack
CDH Version
[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_memory_anon_huge_page_bytes

Description
Total bytes of anonymous (a.k.a. transparent) huge pages used by this process
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_memory_mapped_bytes

Description
Total bytes of memory mappings in this process (the virtual memory size)
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_memory_num_maps

Description
Total number of memory mappings in this process
Unit
regions
Parents
cluster, impala, rack
CDH Version
[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_memory_rss

Description
Resident set size (RSS) of this process, including TCMalloc, buffer pool and Jvm
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_memory_total_used

Description
Total memory currently used by TCMalloc and buffer pool
Unit
bytes
Parents
cluster, impala, rack
CDH Version
[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_num_fragments_in_flight

Description
The number of query fragment instances currently executing
Unit
message.units.objects
Parents
cluster, impala, rack
CDH Version
[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_num_queries_registered

Description
Number of Queries Registered, Includes Queries That Are in Flight and Waiting to Be Closed
Unit
message.units.objects
Parents
cluster, impala, rack
CDH Version
[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_rpc_data_stream_service_rpcs_queue_overflow_rate

Description
Total number of incoming DataStreamService RPCs that were rejected due to overflow of the incoming service queue
Unit
requests per second
Parents
cluster, impala, rack
CDH Version
[CDH 5.7.0..CDH 6.0.0), [CDH 6.0.0..CDH 7.0.0), [CDH 7.0.0..CDH 8.0.0)