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  • 解读:计数器Counter

    解读:计数器Counter

    http://www.cnblogs.com/codeOfLife/p/5521356.html 这个讲的更详细

    17/05/23 17:18:53 INFO mapreduce.Job: Counters: 49 #  6类()49个计数器(亲自数了一遍)。
        File System Counters
            FILE: Number of bytes read=12222
            FILE: Number of bytes written=239539
            FILE: Number of read operations=0
            FILE: Number of large read operations=0
            FILE: Number of write operations=0
            HDFS: Number of bytes read=11316
            HDFS: Number of bytes written=1892
            HDFS: Number of read operations=8
            HDFS: Number of large read operations=0
            HDFS: Number of write operations=2
        Job Counters 
            Launched map tasks=1
            Launched reduce tasks=1
            Other local map tasks=1
            Total time spent by all maps in occupied slots (ms)=21775
            Total time spent by all reduces in occupied slots (ms)=16960
            Total time spent by all map tasks (ms)=21775
            Total time spent by all reduce tasks (ms)=16960
            Total vcore-milliseconds taken by all map tasks=21775
            Total vcore-milliseconds taken by all reduce tasks=16960
            Total megabyte-milliseconds taken by all map tasks=22297600
            Total megabyte-milliseconds taken by all reduce tasks=17367040
        Map-Reduce Framework
            Map input records=108
            Map output records=216
            Map output bytes=11784
            Map output materialized bytes=12222
            Input split bytes=279
            Combine input records=0
            Combine output records=0
            Reduce input groups=36
            Reduce shuffle bytes=12222
            Reduce input records=216
            Reduce output records=36
            Spilled Records=432
            Shuffled Maps =1
            Failed Shuffles=0
            Merged Map outputs=1
            GC time elapsed (ms)=232
            CPU time spent (ms)=2180
            Physical memory (bytes) snapshot=273268736
            Virtual memory (bytes) snapshot=4118401024
            Total committed heap usage (bytes)=137498624
        Shuffle Errors
            BAD_ID=0
            CONNECTION=0
            IO_ERROR=0
            WRONG_LENGTH=0
            WRONG_MAP=0
            WRONG_REDUCE=0
        File Input Format Counters 
            Bytes Read=0
        File Output Format Counters 
            Bytes Written=1892
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  • 原文地址:https://www.cnblogs.com/rocky-AGE-24/p/6895114.html
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