zhengchenyu opened a new pull request, #3292: URL: https://github.com/apache/hive/pull/3292
I found an application which is slow in our cluster, because the proccess bytes of one reduce is very huge, but only two reduce. when I debug, I found the reason. Because in this sql, one big size table (about 30G) with few row count(about 3.5M), another small size table (about 100M) have more row count (about 3.6M). So JoinStatsRule.process only use 100M to estimate reducer's number. But we need to process 30G byte in fact. https://issues.apache.org/jira/browse/HIVE-25335 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
