9. 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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