[ https://issues.apache.org/jira/browse/ARROW-1627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wes McKinney resolved ARROW-1627. --------------------------------- Resolution: Fixed Issue resolved by pull request 1150 [https://github.com/apache/arrow/pull/1150] > [JAVA] Reduce heap usage(Phase 2) - memory footprint in > AllocationManager.BufferLedger > -------------------------------------------------------------------------------------- > > Key: ARROW-1627 > URL: https://issues.apache.org/jira/browse/ARROW-1627 > Project: Apache Arrow > Issue Type: Improvement > Components: Java - Memory > Reporter: Yuliya Feldman > Assignee: Yuliya Feldman > Labels: pull-request-available > Fix For: 0.8.0 > > > Currently we instantiate IdentityHashMap while creating an instance of > AllocationManager which is in turn is part of BufferLedger > By default IdentityHashMap allocates an array of 64 objects which is 272 > bytes of heap from the start. In reality a lot of ArrowBuf(s) will not need > that many entries in the map, since they want share BufferAllocators with > many other BufferLedgers. > Suggestion is to come up with different collection to save heap w/o > sacrificing much of the performance (if any). > I have a suggestion in mind that I will share via a doc. later today -- This message was sent by Atlassian JIRA (v6.4.14#64029)