目前用的kylin版本是2.5.0,经常会出现慢查询的问题,看了下日志是读取hbase的时候比较慢,日志如下
INFO  [kylin-coproc--pool2-t35545] v2.CubeHBaseEndpointRPC:284 : <sub-thread 
for Query 68b403c9-ee74-84ae-dd8f-970c65987127 GTScanRequest 43f21227>Endpoint 
RPC returned from HTable KYLIN:KYLIN_4JDXIZOJM8 Shard 
\x4B\x59\x4C\x49\x4E\x3A\x4B\x59\x4C\x49\x4E\x5F\x34\x4A\x44\x58\x49\x5A\x4F\x4A\x4D\x38\x2C\x00\x01\x2C\x31\x35\x37\x30\x36\x30\x36\x33\x36\x36\x30\x32\x33\x2E\x64\x30\x63\x30\x35\x37\x38\x36\x35\x37\x33\x33\x37\x65\x37\x32\x65\x65\x30\x61\x37\x62\x65\x33\x64\x33\x35\x30\x65\x37\x32\x36\x2E
 on host: prod-bigdata-hadoop-05.sh.Total scanned row: 1. Total scanned bytes: 
55. Total filtered row: 0. Total aggred row: 0. Time elapsed in EP: 2257(ms). 
Server CPU usage: 0.04703040636544473, server physical mem left: 4.590424064E9, 
server swap mem left:0.0.Etc message: start latency: 7@1,agg done@2257,compress 
done@2257,server stats done@2257, 
debugGitTag:3b4643245b19efd5b8b7fc96181846f1854345a5;.Normal Complete: 
true.Compressed row size: 26

多个线程并发读取hbase的时候,经常有一些线程的响应时间很久,但是没有搞清楚具体原因



ning.w...@ymm56.com

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