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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-5131) Make spilling to disk for order/group by configurable
Date Sat, 16 Mar 2019 00:29:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-5131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16794061#comment-16794061
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Lars Hofhansl commented on PHOENIX-5131:
----------------------------------------

I wonder whether we want to turn spooling off by default.
Also instead of two setting, we could just make a spooling threshold of 0 to mean no spooling.
(just a nit, Phoenix has sooo many config options already)

> Make spilling to disk for order/group by configurable
> -----------------------------------------------------
>
>                 Key: PHOENIX-5131
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5131
>             Project: Phoenix
>          Issue Type: Improvement
>            Reporter: Abhishek Singh Chouhan
>            Assignee: Abhishek Singh Chouhan
>            Priority: Major
>             Fix For: 4.15.0, 5.1.0
>
>         Attachments: PHOENIX-5131-4.x-HBase-1.2.patch, PHOENIX-5131-4.x-HBase-1.3.patch,
PHOENIX-5131-4.x-HBase-1.4.patch, PHOENIX-5131-master-v2.patch, PHOENIX-5131-master-v2.patch,
PHOENIX-5131-master-v3.patch, PHOENIX-5131-master-v4.patch, PHOENIX-5131-master.patch, PHOENIX-5131-master.patch
>
>
> We've observed that large queries, doing order/group by leading to issues on the regionserver
(crashes/long gc pauses/file handler exhaustion etc.). We should make spilling to disk configurable
and in case its disabled, fail the query once it hits the spilling limit on any of the region
servers. Also make spooling threshold server-side property only to prevent clients from controlling
memory allocation on the rs side.



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