Impala StateStore 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 StateStore:
- alerts_rate_across_clusters
- total_alerts_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 |
|---|---|---|---|---|
| alerts_rate | The number of alerts. | events per second | cluster, impala, rack | CDH 5 |
| cgroup_cpu_system_rate | CPU usage of the role's cgroup | seconds per second | cluster, impala, rack | CDH 5 |
| cgroup_cpu_user_rate | User Space CPU usage of the role's cgroup | seconds per second | cluster, impala, rack | CDH 5 |
| cgroup_mem_page_cache | Page cache usage of the role's cgroup | bytes | cluster, impala, rack | CDH 5 |
| cgroup_mem_rss | Resident memory of the role's cgroup | bytes | cluster, impala, rack | CDH 5 |
| cgroup_mem_swap | Swap usage of the role's cgroup | bytes | cluster, impala, rack | CDH 5 |
| cgroup_read_bytes_rate | Bytes read from all disks by the role's cgroup | bytes per second | cluster, impala, rack | CDH 5 |
| cgroup_read_ios_rate | Number of read I/O operations from all disks by the role's cgroup | ios per second | cluster, impala, rack | CDH 5 |
| cgroup_write_bytes_rate | Bytes written to all disks by the role's cgroup | bytes per second | cluster, impala, rack | CDH 5 |
| cgroup_write_ios_rate | Number of write I/O operations to all disks by the role's cgroup | ios per second | cluster, impala, rack | CDH 5 |
| cpu_system_rate | Total System CPU | seconds per second | cluster, impala, rack | CDH 5 |
| cpu_user_rate | Total CPU user time | seconds per second | cluster, impala, rack | CDH 5 |
| events_critical_rate | The number of critical events. | events per second | cluster, impala, rack | CDH 5 |
| events_important_rate | The number of important events. | events per second | cluster, impala, rack | CDH 5 |
| events_informational_rate | The number of informational events. | events per second | cluster, impala, rack | CDH 5 |
| fd_max | Maximum number of file descriptors | file descriptors | cluster, impala, rack | CDH 5 |
| fd_open | Open file descriptors. | file descriptors | cluster, impala, rack | CDH 5 |
| health_bad_rate | Percentage of Time with Bad Health | seconds per second | cluster, impala, rack | CDH 5 |
| health_concerning_rate | Percentage of Time with Concerning Health | seconds per second | cluster, impala, rack | CDH 5 |
| health_disabled_rate | Percentage of Time with Disabled Health | seconds per second | cluster, impala, rack | CDH 5 |
| health_good_rate | Percentage of Time with Good Health | seconds per second | cluster, impala, rack | CDH 5 |
| health_unknown_rate | Percentage of Time with Unknown Health | seconds per second | cluster, impala, rack | CDH 5 |
| mem_rss | Resident memory used | bytes | cluster, impala, rack | CDH 5 |
| mem_swap | Amount of swap memory used by this role's process. | bytes | cluster, impala, rack | CDH 5 |
| mem_virtual | Virtual memory used | bytes | cluster, impala, rack | CDH 5 |
| oom_exits_rate | 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. | exits per second | cluster, impala, rack | CDH 5 |
| read_bytes_rate | The number of bytes read from the device | bytes per second | cluster, impala, rack | CDH 5 |
| statestore_live_backends | The number of active subscribers to this this StateStore. | backends | cluster, impala, rack | CDH 5 |
| statestore_total_key_size_bytes | The sum of the size of all keys for all topics tracked by the StateStore. | bytes | cluster, impala, rack | CDH 5 |
| statestore_total_topic_size_bytes | The sum of the size of all keys and all values for all topics tracked by the StateStore. | bytes | cluster, impala, rack | CDH 5 |
| statestore_total_value_size_bytes | The sum of the size of all values for all topics tracked by the StateStore. | bytes | cluster, impala, rack | CDH 5 |
| subscriber_client_cache_clients_in_use | The total number of active subscriber clients in this StateStore's client cache. These clients are for communication with Impala Daemons. | connections | cluster, impala, rack | CDH 5 |
| subscriber_client_cache_total_clients | The total number of subscriber clients in this StateStore's client cache. These clients are for communication with Impala Daemons. | connections | cluster, impala, rack | CDH 5 |
| tcmalloc_bytes_in_use | 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. | bytes | cluster, impala, rack | CDH 5 |
| tcmalloc_pageheap_free_bytes | 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. | bytes | cluster, impala, rack | CDH 5 |
| tcmalloc_pageheap_unmapped_bytes | 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. | bytes | cluster, impala, rack | CDH 5 |
| tcmalloc_physical_bytes_reserved | 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. | bytes | cluster, impala, rack | CDH 5 |
| tcmalloc_total_bytes_reserved | Bytes of system memory reserved by TCMalloc. | bytes | cluster, impala, rack | CDH 5 |
| thread_manager_running_threads | The number of running threads in this process. | threads | cluster, impala, rack | CDH 5 |
| thread_manager_threads_created_rate | Threads created over the lifetime of the process. | threads per second | cluster, impala, rack | CDH 5 |
| thrift_server_state_store_service_connections_in_use | The number of active connections to this StateStore's StateStore service. | connections | cluster, impala, rack | CDH 5 |
| thrift_server_state_store_service_connections_rate | The total number of connections made to this StateStore's StateStore service over its lifetime. | connections per second | cluster, impala, rack | CDH 5 |
| unexpected_exits_rate | The number of times the role's backing process exited unexpectedly. | exits per second | cluster, impala, rack | CDH 5 |
| uptime | For a host, the amount of time since the host was booted. For a role, the uptime of the backing process. | seconds | cluster, impala, rack | CDH 5 |
| web_metrics_collection_duration | Web Server Responsiveness | ms | cluster, impala, rack | CDH 5 |
| write_bytes_rate | The number of bytes written to the device | bytes per second | cluster, impala, rack | CDH 5 |