[jira] [Commented] (DRILL-5265) External Sort consumes more memory than allocated

["Paul Rogers (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-5265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16083061#comment-16083061 ] 

Paul Rogers commented on DRILL-5265:
------------------------------------

There are no logs or profiles attached to this issue.

In general, Drill's allocator mechanism will kill a query that attempts to allocate more memory than the limit. The sort does "fudge" by giving itself an extra 10% margin, but should (almost) never use it.

This is, perhaps, an error with rounding? MiB vs. MB units confusion? Can't tell until I see the profile and logs...

> External Sort consumes more memory than allocated
> -------------------------------------------------
>
>                 Key: DRILL-5265
>                 URL: https://issues.apache.org/jira/browse/DRILL-5265
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Rahul Challapalli
>             Fix For: 1.12.0
>
>
> git.commit.id.abbrev=300e934
> Based on the profile for the below query, the external sort has a peak memory usage of ~126MB when only ~100MB was allocated 
> {code}
> alter session set `planner.memory.max_query_memory_per_node` = 104857600;
> alter session set `planner.width.max_per_node` = 1;
> select * from dfs.`/drill/testdata/md1362` order by c_email_address;
> {code}
> I attached the profile and the log files



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)