Details
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Improvement
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Status: Open
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Minor
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Resolution: Unresolved
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0.22.0
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None
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None
Description
We currently have SLOTS_MILLIS_REDUCES which measures the total slot time of reducer.
It will be useful if we have
SLOTS_MILLIS_REDUCES_COPY SLOTS_MILLIS_REDUCES_SORT SLOTS_MILLIS_REDUCES_REDUCE
which measures three different phases of a reducer.
This will help us identify the bottleneck of the reducers.