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https://issues.apache.org/jira/browse/DRILL-5505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rahul Challapalli updated DRILL-5505:
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Attachment: exch_enabled.sys.drill
exch_disabled.sys.drill
drillbit.log
> Enabling exchanges increased the external sorts spill count by 2 times
> ----------------------------------------------------------------------
>
> Key: DRILL-5505
> URL: https://issues.apache.org/jira/browse/DRILL-5505
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.10.0
> Reporter: Rahul Challapalli
> Assignee: Paul Rogers
> Attachments: drillbit.log, exch_disabled.sys.drill,
> exch_enabled.sys.drill
>
>
> git.commit.id.abbrev=1e0a14c
> Based on the profile, the below query spilled 32 times
> {code}
> ALTER SESSION SET `exec.sort.disable_managed` = false;
> alter session set `planner.width.max_per_node` = 1;
> alter session set `planner.width.max_per_node` = 1;
> alter session set `planner.disable_exchanges` = true;
> alter session set `planner.memory.max_query_memory_per_node` = 62914560;
> select count(*) from (select * from
> dfs.`/drill/testdata/resource-manager/250wide-small.tbl` order by
> columns[0])d where d.columns[0] = 'ljdfhwuehnoiueyf';
> {code}
> Now if I enabled the exchanges, rest all being same, the same query spilled
> 66 times. I attached the 2 profiles and the log file.
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