Thank your repling, .but I am sure there's only one OlapContext in the quey in my scenario. ---Original--- From: "JiaTao Tao"<taojia...@gmail.com> Date: Sat, Nov 3, 2018 10:42 AM To: "user"<user@kylin.apache.org>; Subject: Re: doubt about measure of processedRowCount
Maybe count all the valueA would be more appropriate, cuz maybe there's more than one OlapContext in the query ( one OlapContext correspond one storageContext ). There are two good blogs about Kylin's query engine, you may take a look :). https://blog.csdn.net/yu616568/article/details/50838504 https://zhuanlan.zhihu.com/p/30613434 cheney <531014...@qq.com> ??2018??11??2?????? ????11:10?????? Hi, guys When I executed a sql in kylin, kylin server will log some log about query statics. for example, The log is as following: "Processed rows for each storageContext: valueA". valueA is processedRowCount. What I understand is processedRowCount is the record rows numbers returned by hbase. Hbase corprocessor will log region stats, including: "Total scanned row","Total filtered/aggred row". For one region, final records returned by hbase = Total scanned row - Total filtered/aggred row; Suppose this query need to scan 10 region in hbase, we can get every region stats. we can get all records valueB returned by hbase by suming every final records in 10 region. In general, valueA is equal to valueB, but valueB is much larger than valueA in sometimes. Why? -- Regards! Aron Tao
