Impala Daemons

The Impala Daemons page displays time series data for Impala daemons.

You can use these charts to view anomalies such as an increase in open files at a particular time and improve queries to reduce the access of files.

Chart Name	Description
Local Assignments	The number of assignments operating on local data for each Impala Daemon.
Aggregated Local Assignments Across Impala Daemons.	The total number of assignments operating on local data across all Impala Daemons.
JVM Heap Committed Usage	The JVM heap committed usage for each Impala daemon.
Aggregated JVM Heap Committed Usage Across Impala Daemons.	The total JVM heap committed usage across all Impala Daemons.
Aggregated JVM Heap Current Usage Across Impala Daemons	The total JVM heap current usage across all Impala Daemons.
JVM Heap Init Usage	The JVM heap init usage for each Impala Daemon.
Aggregated JVM Heap Init Usage Across Impala Daemons	The total JVM heap init usage across all Impala Daemons.
Virtual Memory Size	The virtual memory size for each Impala daemon.
Aggregated Virtual Memory Size Across Impala Daemons	The total virtual memory size across all Impala daemons.
Resident Set Size	The Resident Set Size (RSS) of this process, including TCMalloc, buffer pool, and JVM for each Impala Daemon.
Aggregated Resident Set Size Across Impala Daemons.	The total resident set size across all Impala Daemons.
Used Memory	The memory currently used by TCMalloc and buffer pool for each Impala Daemon.
Aggregated Used Memory Across Impala Daemons	The total memory used across all Impala daemons.
Number of Assignments	The number of assignments for each Impala Daemon.
Aggregated Number of Assignments Across Impala Daemons	The total number of assignments for all Impala daemons.
Number of Databases	The number of databases in the catalog for each Impala Daemon.
Aggregated Number of Databases Across Impala Daemons	The total number of databases in the catalog across all Impala daemons.
Memory Limit	The amount of memory available to the memory tracker over the life of the process for each Impala Daemon.
Aggregated Memory Limit	The total amount of memory available to the memory tracker over the life of the process across all Impala Daemons.
Memory Bytes Over Limit	The amount of memory by which the process was over its memory limit the last time the memory limit was encountered for each Impala Daemon.
Aggregated Memory Bytes Over Limit across Impala Daemons.	The total amount of memory usage exceeding the specified limit aggregated over some time or across multiple instances across all Impala Daemons.
Number of Tables	The number of tables in the catalog for each Impala daemon.
Aggregated Number of Tables	The total number of tables in the catalog across all Impala daemons.
Buffer Memory	The buffer memory currently allocated by the buffer pool for each Impala Daemon.
Aggregated Buffer Memory	The total buffer memory currently allocated by the buffer pool across all Impala Daemon.
Number of Open Files	The number of open files for each Impala Daemon.
Aggregated Number of Open Files	The total number of open files across all Impala Daemons.

Note The charts display aggregated values of the metrics. To view individual usage of the host, perform the following:

Click Show Individuals in the chart. The drop-down menu is displayed.
Select the host from the host drop-down list.
Select the metric from the metrics drop-down list. The required data is displayed.

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