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Posted to issues-all@impala.apache.org by "Alex Rodoni (Jira)" <ji...@apache.org> on 2019/09/01 17:02:00 UTC
[jira] [Commented] (IMPALA-8913) Add query option for disabling
HBase row estimation
[ https://issues.apache.org/jira/browse/IMPALA-8913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16920461#comment-16920461 ]
Alex Rodoni commented on IMPALA-8913:
-------------------------------------
[~stiga-huang] Is this user-facing and a feature to be documented?
> Add query option for disabling HBase row estimation
> ---------------------------------------------------
>
> Key: IMPALA-8913
> URL: https://issues.apache.org/jira/browse/IMPALA-8913
> Project: IMPALA
> Issue Type: New Feature
> Reporter: Quanlong Huang
> Priority: Major
>
> IMPALA-8058 added a flag, disable_hbase_row_est, in the QueryCtx for tests to bypass the codes of estimating HBase row stats from HBase RPCs and fall back to HMS row count stats.
> It's useful for point queries on high loaded HBase clusters, where we should reduce the #RPCs to HBase.
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