Shaofeng SHI created KYLIN-2243: ----------------------------------- Summary: TopN memory estimation is inaccurate in some cases Key: KYLIN-2243 URL: https://issues.apache.org/jira/browse/KYLIN-2243 Project: Kylin Issue Type: Bug Reporter: Shaofeng SHI Fix For: Backlog
TopNCounterSerializer.maxLength() and TopNCounterSerializer.getStorageBytesEstimate() might be inaccurate, especially when there are multiple "group by" columns in one TopN measure and some uses long bytes encoding like "fixed_length:16" The inaccurate estimation may cause memory issue when using in-mem cubing, and will cause the estimation on final cube size inaccurate. -- This message was sent by Atlassian JIRA (v6.3.4#6332)