[ https://issues.apache.org/jira/browse/MADLIB-1301?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nandish Jayaram reassigned MADLIB-1301: --------------------------------------- Assignee: Nandish Jayaram > Improve correlation and covariance memory usage with large number of groups > --------------------------------------------------------------------------- > > Key: MADLIB-1301 > URL: https://issues.apache.org/jira/browse/MADLIB-1301 > Project: Apache MADlib > Issue Type: Improvement > Components: Module: Descriptive Statistics > Reporter: Frank McQuillan > Assignee: Nandish Jayaram > Priority: Major > Fix For: v1.17 > > > When correlation and covariance are run with large number of groups (100's), > can run out of memory. Increasing statement_mem helps, but this JIRA is to > investigate and improve memory usage with large numbers of groups. > Sample findings on correlation for 300K input data set: > || #groups || statement mem 186M || statement mem 200M || statement mem 500M > || statement mem 1000M || > | 6 | Success | Success | Success | - | > | 127 | Success | Success | - | - | > | 930 | Fail | Fail | Success | - | > | 1213 | Fail | Fail | Success | - | > | 4852 | Fail | Fail | Fail | Fail | > The question is: > * is this a bug? > * or is it a limitation of current grouping design? -- This message was sent by Atlassian JIRA (v7.6.3#76005)