Re: mapreduce memory issues

[Tamas Jambor]

just one more question on this. It looks like the algorithm overrides 
the default values for mapred.map.tasks and mapred.reduce.tasks. how did 
you decide on those? it doesn't look optimal.
For example for job 
RecommenderJob-IdentityMapper-AggregateAndRecommendReducer
it sets mapred.map.tasks to 145 and mapred.reduce.tasks to just 1...