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From jinxing64 <>
Subject [GitHub] spark pull request #17276: [WIP][SPARK-19937] Collect metrics of block sizes...
Date Mon, 13 Mar 2017 13:45:40 GMT
GitHub user jinxing64 opened a pull request:

    [WIP][SPARK-19937] Collect metrics of block sizes when shuffle.

    ## What changes were proposed in this pull request?
    Metrics of blocks sizes(when shuffle) should be collected for later analysis. This is
helpful for analysis when skew situations or OOM happens(though maxBytesInFlight is set).
    This pr proposes to:
    1. Store the distribution of sizes in `MapStatus` and count the block sizes in ranges
    [0, 1k), [1k, 10k), [10k, 100k), [100k, 1m), [1m, 10m), [10m, 100m), [100m, 1g), [1g,
10g), [10g, Long.MaxValue).
    2. Record the inaccuracy of block sizes. Because `HighlyCompressedMapStatus` is returned
and only average size is recorded when block sizes is over 2000.
    ## How was this patch tested?

You can merge this pull request into a Git repository by running:

    $ git pull SPARK-19937

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #17276
commit 430ec95291393f49096fc07df98c15e700f23e8c
Author: jinxing <>
Date:   2017-03-13T13:35:51Z

    [SPARK-19937] Collect metrics of block sizes when shuffle.


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