Summary

Description

Tag for performance-related improvements/optimizations

Issues: Unresolved

Key Summary Due Date
Improvement MAPREDUCE-3235 Improve CPU cache behavior in map side sort
Bug MAPREDUCE-3561 [Umbrella ticket] Performance issues in YARN+MR
Improvement MAPREDUCE-3895 Speculative execution algorithm in 1.0 is too pessimistic in many cases

View Issues

Issues: Updated recently

Key Summary Updated
Bug MAPREDUCE-5821 IFile merge allocates new byte array for every value
Improvement MAPREDUCE-5487 In task processes, JobConf is unnecessarily loaded again in Limits
Sub-task MAPREDUCE-5462 In map-side sort, swap entire meta entries instead of indexes for better cache performance

View Issues

Versions: Unreleased

Name Release date
Unreleased 0.20.204.0  
Unreleased 0.20.204.1  
Unreleased 0.24.0  
Unreleased 0.22.1  
Unreleased 0.23.2  
Unreleased 3.0.0  
Unreleased head  
Unreleased trunk  
Unreleased 1-win  
Unreleased MR-3902  
Unreleased trunk-win  
Unreleased MR-2454  
Unreleased 1.1.3  
Unreleased 1.3.0  
Unreleased 0.23.11  
Unreleased 1.2.2  
Unreleased 2.4.0  
Unreleased 2.5.0  
Unreleased 2.4.1  

...and 14 more

Show first 5 only