Apache Ambari User Guide
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HBase - Home

The HBase - Home dashboards display basic statistics about an HBase cluster. These dashboards provide insight to the overall status for the HBase cluster.

RowMetrics

Description

REGIONSERVERS / REGIONS

Num RegionServers

Total number of RegionServers in the cluster.

Num Dead RegionServers

Total number of RegionServers that are dead in the cluster.

Num Regions

Total number of regions in the cluster.

Avg Num Regions per RegionServer

Average number of regions per RegionServer.

NUM REGIONS/STORES

Num Regions / Stores - Total

Total number of regions and stores (column families) in the cluster.

Store File Size / Count - Total

Total data file size and number of store files.

NUM REQUESTS

Num Requests - Total

Total number of requests (read, write and RPCs) in the cluster.

Num Request - Breakdown - Total

Total number of get,put,mutate,etc requests in the cluster.

REGIONSERVER MEMORY

RegionServer Memory - Average

Average used, max or committed on-heap and offheap memory for RegionServers.

RegionServer Offheap Memory - Average

Average used, free or committed on-heap and offheap memory for RegionServers.

MEMORY - MEMSTORE BLOCKCACHE

Memstore - BlockCache - Average

Average blockcache and memstore sizes for RegionServers.

Num Blocks in BlockCache - Total

Total number of (hfile) blocks in the blockcaches across all RegionServers.

BLOCKCACHE

BlockCache Hit/Miss/s Total

Total number of blockcache hits misses and evictions across all RegionServers.

BlockCache Hit Percent - Average

Average blockcache hit percentage across all RegionServers.

OPERATION LATENCIES - GET/MUTATE

Get Latencies - Average

Average min, median, max, 75th, 95th, 99th percentile latencies for Get operation across all RegionServers.

Mutate Latencies - Average

Average min, median, max, 75th, 95th, 99th percentile latencies for Mutate operation across all RegionServers.

OPERATION LATENCIES - DELETE/INCREMENT

Delete Latencies - Average

Average min, median, max, 75th, 95th, 99th percentile latencies for Delete operation across all RegionServers.

Increment Latencies - Average

Average min, median, max, 75th, 95th, 99th percentile latencies for Increment operation across all RegionServers.

OPERATION LATENCIES - APPEND/REPLAY

Append Latencies - Average

Average min, median, max, 75th, 95th, 99th percentile latencies for Append operation across all RegionServers.

Replay Latencies - Average

Average min, median, max, 75th, 95th, 99th percentile latencies for Replay operation across all RegionServers.

REGIONSERVER RPC

RegionServer RPC -Average

Average number of RPCs, active handler threads and open connections across all RegionServers.

RegionServer RPC Queues - Average

Average number of calls in different RPC scheduling queues and the size of all requests in the RPC queue across all RegionServers.

REGIONSERVER RPC

RegionServer RPC Throughput - Average

Average sent and received bytes from the RPC across all RegionServers.