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?
