Database Reference
In-Depth Information
Figure 16.13 MapReduce summary report
Finally, the JobTracker Summary provides details into the memory heap
utilization, threads status, garbage collection time, and average RPC wait
time (see Figure 16.14 ). The Memory Heap Utilization graph shows memory
heap committed and used for the Jobtracker Service. The Threads Status
report shows the threads runnable, waiting, and blocked. The Garbage
Collection Time graph shows the time in milliseconds that it takes to run
garbage collection. The Average RPC Wait Time Graph shows wait time. If
the average RPC wait time grows significantly, look for jobs running a very
large number of short running tasks.
 
 
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