You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@impala.apache.org by "Csaba Ringhofer (Jira)" <ji...@apache.org> on 2023/05/30 14:19:00 UTC

[jira] [Created] (IMPALA-12171) Slow CSV output in Impala-shell

Csaba Ringhofer created IMPALA-12171:
----------------------------------------

             Summary: Slow CSV output in Impala-shell
                 Key: IMPALA-12171
                 URL: https://issues.apache.org/jira/browse/IMPALA-12171
             Project: IMPALA
          Issue Type: Improvement
          Components: Clients
            Reporter: Csaba Ringhofer


Delimited output is much faster then pretty printing, but can still  be the bottleneck when printing large result sets (50-80% of CPU time in impala-shell).

Was able to significantly improve performance by rewriting adding custom CSV writer to DelimitedOutputFormatter:
https://gerrit.cloudera.org/#/c/19894/



--
This message was sent by Atlassian Jira
(v8.20.10#820010)