Yuan Tian created IOTDB-5522: -------------------------------- Summary: Last Query performance improvement Key: IOTDB-5522 URL: https://issues.apache.org/jira/browse/IOTDB-5522 Project: Apache IoTDB Issue Type: Improvement Components: Core/Query Reporter: Yuan Tian Assignee: liaolanyu Attachments: image-2023-02-10-21-23-28-478.png
If we have a lot of data regions and then we execute `select last s1 from root.sg.d1`, this sql may not execute that fast as we expected, because it may need to wait for all data regions' result and then merge it. In some user's case, we build a 1C9D cluster, we set dataregion per database to 27. We need 300ms to get the last query result which even slower than MatrixDB. !image-2023-02-10-21-23-28-478.png! -- This message was sent by Atlassian Jira (v8.20.10#820010)