Istvan Toth created PHOENIX-6983: ------------------------------------ Summary: Add hint to disable server merges for uncovered index queries Key: PHOENIX-6983 URL: https://issues.apache.org/jira/browse/PHOENIX-6983 Project: Phoenix Issue Type: Improvement Components: core Affects Versions: 5.1.3, 5.2.0 Reporter: Istvan Toth
In certain cases, the new server merge code is far less efficient than the old skip-scan-merge code path. Specifically, when a large number of rows is matched on the index table, then each of those rows has to be resolved from the data table, and the filtering must be done on the index RS. With the old code path, these filters were pushed to the data table, and processed in parallel, with much better performance. -- This message was sent by Atlassian Jira (v8.20.10#820010)