impala执行部分查询语句时，[客户端获取等待时间]占整体时间占比很高，导致过慢 (When impala executes some query statements, [client acquisition waiting time] accounts for a high proportion of the overall time, resulting in too slow)

Hi @KaimingGu , the translation might have been incorrect, so I assume you're actually facing "Client Fetch Wait Time" taking the most of the time. At the same time the "Client Fetch Wait Time Percentage" is also close to 100%. 

This means that while the query has been executed quicky, the client was too slow to fetch the results. This is usually a sign that the network may be slow or the client is facing other slowness, for example it does some processing between the "result.next()" calls, or hitting GC pauses (if it's a Java application).

See also the following blog post which explains the different query profile metrics:

https://www.ericlin.me/2020/02/impala-query-profile-explained-part-5-query-metrics/

Best regards

 Miklos Szurap

Customer Operations Engineer, Cloudera