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Similar to some of our other resource management objects, the buffered block mgr will be shared by all fragments within a query. The memory given to the block mgr is based on the query limit (e.g. 80% of query limit). We can't have each fragment having a block mgr that uses 80% of the query limit and we probably don't want to impose per fragment limits. Change-Id: Idcd89f302534b37ed236cdd42784ae8d717ec29e Reviewed-on: http://gerrit.sjc.cloudera.com:8080/3965 Reviewed-by: Nong Li <nong@cloudera.com> Tested-by: jenkins Reviewed-on: http://gerrit.sjc.cloudera.com:8080/4179