LLAP and HiveServer Interactive properties
Using Ambari , you can check and configure key properties in Interactive Query settings. You can check, configure, or add some LLAP properties in . Knowing the internal names and definitions of the properties helps simplify the LLAP configuration task.
| Ambari UI Component | Property | Access From | Description |
|---|---|---|---|
| Custom hiveserver2-interactive-site | hive.server2.tez.interactive.queue | Services > Hive > Configs | The name of a YARN queue for workload management, required for managing workloads |
| In-Memory Cache per Daemon | hive.llap.io.memory.size | Interactive Query | Memory reserved for in-memory cache (memory per daemon - heap – headroom). |
| Memory per Daemon | hive.llap.daemon.yarn.container.mb | Interactive Query | Total memory used by LLAP daemons (YARN Container size), which includes memory for daemon cache and query execution (cache + heap + headroom = memory per daemon.) Recommendation: Set to yarn.scheduler.maximum-allocation-mb |
| Tez Container Size | hive.tez.container.size | Optimization | Change to override java options from map tasks that Tez uses by default. Recommended: 4 – 6 GB recommended, for each executor allocate one VCPU |
| LLAP Daemon Container Max Headroom | llap_headroom_space | Advanced hive-interactive-env | Maximum headroom reserved from YARN container running LLAP. The upper limit used for automatic size calculations. Actual value might be lower. Minimum: 5 percent of LLAP Daemon Size or 6 GB. |
| LLAP Daemon Heap Size (MB) | llap_heap_size | Advanced hive-interactive-env | hive.llap.daemon.num.executors * hive.tez.container.size |
| LLAP Queue Size | yarn.scheduler.capacity.root.llap.capacity | Capacity Scheduler | The capacity as a percentage of total allocated to the queue. |
| Maximum Total Concurrent Queries | hive.server2.tez.sessions.per.default.queue | Services > Hive > Configs > Advanced | A positive integer that determines the number of Tez sessions (parallelism) launched on each hive.server2.tez.default.queue. Spawns an equal number of TEZ AMs. |
| Maximum Container Size (Memory) | yarn.scheduler.maximum-allocation-mb | Services > YARN > Configs > Memory | The maximum allocation for every container request at the Resource Manager in MBs. Higher memory capped to this value. |
| Number of Nodes for Running Hive LLAP Daemon | num_llap_nodes_for_llap_daemons | Advanced hive-interactive-env | Self-explanatory |
| Number of Executors per LLAP Daemon | hive.llap.daemon.num.executors | Interactive Query | The number of fragments a single LLAP daemon runs concurrently, generally equals yarn.scheduler.maximum-allocation-vcores. |
| Tez AM coordinator Size | tez.am.resource.memory.mb | Advanced tez-interactive-site | The memory used by the AppMaster only if the value is not explicit in the DAG definition. Same as yarn.scheduler.minimum-allocation-mb. |