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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/11/02 00:11:00 UTC
[jira] [Work logged] (HIVE-18920) CBO: Initialize the Janino
providers ahead of 1st query
[ https://issues.apache.org/jira/browse/HIVE-18920?focusedWorklogId=672913&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-672913 ]
ASF GitHub Bot logged work on HIVE-18920:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 02/Nov/21 00:10
Start Date: 02/Nov/21 00:10
Worklog Time Spent: 10m
Work Description: github-actions[bot] closed pull request #2596:
URL: https://github.com/apache/hive/pull/2596
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Issue Time Tracking
-------------------
Worklog Id: (was: 672913)
Time Spent: 40m (was: 0.5h)
> CBO: Initialize the Janino providers ahead of 1st query
> -------------------------------------------------------
>
> Key: HIVE-18920
> URL: https://issues.apache.org/jira/browse/HIVE-18920
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Reporter: Gopal Vijayaraghavan
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-18920.01.patch, HIVE-18920.02.patch, HIVE-18920.patch
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Hive Calcite metadata providers are compiled when the 1st query comes in.
> If a second query arrives before the 1st one has built a metadata provider, it will also try to do the same thing, because the cache is not populated yet.
> With 1024 concurrent users, it takes 6 minutes for the 1st query to finish fighting all the other queries which are trying to load that cache.
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