1.2. Viewing Heatmaps

Heatmaps provides a graphical representation of your overall cluster utilization using simple color coding.

A colored block represents each host in your cluster. To see more information about a specific host, hover over the block representing the host in which you are interested. A pop-up window displays metrics about HDP components installed on that host. Colors displayed in the block represent usage in a unit appropriate for the selected set of metrics. If any data necessary to determine state is not available, the block displays "Invalid Data". Changing the default maximum values for the heatmap lets you fine tune the representation. Use the Select Metric drop-down to select the metric type.

Heatmaps supports the following metrics:

Metric Uses
Host/Disk Space Used % disk.disk_free and disk.disk_total
Host/Memory Used % memory.mem_free and memory.mem_total
Host/CPU Wait I/O % cpu.cpu_wio
HDFS/Bytes Read dfs.datanode.bytes_read
HDFS/Bytes Written dfs.datanode.bytes_written
HDFS/Garbage Collection Time jvm.gcTimeMillis
HDFS/JVM Heap MemoryUsed jvm.memHeapUsedM
YARN/Garbage Collection Time jvm.gcTimeMillis
YARN / JVM Heap Memory Used jvm.memHeapUsedM
YARN / Memory used % UsedMemoryMB and AvailableMemoryMB
HBase/RegionServer read request count hbase.regionserver.readRequestsCount
HBase/RegionServer write request count hbase.regionserver.writeRequestsCount
HBase/RegionServer compaction queue size hbase.regionserver.compactionQueueSize
HBase/RegionServer regions hbase.regionserver.regions
HBase/RegionServer memstore sizes hbase.regionserver.memstoreSizeMB

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