[ https://issues.apache.org/jira/browse/HBASE-14978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Elliott Clark updated HBASE-14978: ---------------------------------- Fix Version/s: 1.3.0 3.0.0 1.2.0 > Don't allow Multi to retain too many blocks > ------------------------------------------- > > Key: HBASE-14978 > URL: https://issues.apache.org/jira/browse/HBASE-14978 > Project: HBase > Issue Type: Improvement > Affects Versions: 2.0.0, 1.2.0, 1.3.0 > Reporter: Elliott Clark > Assignee: Elliott Clark > Priority: Critical > Fix For: 1.2.0, 3.0.0, 1.3.0 > > Attachments: HBASE-14978-v1.patch, HBASE-14978-v2.patch, > HBASE-14978-v3.patch, HBASE-14978-v4.patch, HBASE-14978.patch > > > Scans and Multi's have limits on the total size of cells that can be > returned. However if those requests are not all pointing at the same blocks > then the KeyValues can keep alive a lot more data than their size. > Take the following example: > A multi with a list of 10000 gets to a fat row. Each column being returned in > in a different block. Each column is small 32 bytes or so. > So the total cell size will be 32 * 10000 = ~320kb. However if each block is > 128k then total retained heap size will be almost 2gigs. -- This message was sent by Atlassian JIRA (v6.3.4#6332)