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ramkrishna.s.vasudevan commented on HBASE-14921: ------------------------------------------------ I now got to which comment are you referring to wrt CELL_ARRAY_ENTRY. I checked the RB. bq.CELL_ARRAY_MAP_ENTRY = align(OBJECT + 2*REFERENCE + 2*Bytes.SIZEOF_INT); When you see the CELL_ARRAY_MAP_ENTRY it should only have the reference to the cell and one object right? The 2 ints and the byte[] will be accounted in the KeyValue.heapSize(). Now if you add the ref and int here then the KeyValue.heapSize will again add it. So the comment in RB is valid I feel. > Memory optimizations > -------------------- > > Key: HBASE-14921 > URL: https://issues.apache.org/jira/browse/HBASE-14921 > Project: HBase > Issue Type: Sub-task > Affects Versions: 2.0.0 > Reporter: Eshcar Hillel > Assignee: Anastasia Braginsky > Attachments: CellBlocksSegmentInMemStore.pdf, > CellBlocksSegmentinthecontextofMemStore(1).pdf, HBASE-14921-V01.patch, > HBASE-14921-V02.patch, HBASE-14921-V03.patch, HBASE-14921-V04-CA-V02.patch, > HBASE-14921-V04-CA.patch, HBASE-14921-V05-CAO.patch, > InitialCellArrayMapEvaluation.pdf, IntroductiontoNewFlatandCompactMemStore.pdf > > > Memory optimizations including compressed format representation and offheap > allocations -- This message was sent by Atlassian JIRA (v6.3.4#6332)