[ https://issues.apache.org/jira/browse/KUDU-1807?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Adar Dembo reassigned KUDU-1807: -------------------------------- Assignee: Adar Dembo > GetTableSchema() is O(n) in the number of tablets > ------------------------------------------------- > > Key: KUDU-1807 > URL: https://issues.apache.org/jira/browse/KUDU-1807 > Project: Kudu > Issue Type: Sub-task > Components: master, perf > Affects Versions: 1.2.0 > Reporter: Todd Lipcon > Assignee: Adar Dembo > Priority: Critical > Labels: data-scalability > > GetTableSchema calls TableInfo::IsCreateTableDone. This method checks each > tablet for whether it is in the correct state, which requires acquiring the > RWC lock for every tablet. This is somewhat slow for large tables with > thousands of tablets, and this is actually a relatively hot path because > every task in an Impala query ends up calling GetTableSchema() when it opens > its scanner. -- This message was sent by Atlassian JIRA (v6.4.14#64029)