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Date: Tue, 19 Sep 2017 21:41:00 +0000 (UTC)
From: "Robert Hou (JIRA)" <jira@apache.org>
To: issues@drill.apache.org
Message-ID: <JIRA.13069541.1494009388000.151320.1505857260199@Atlassian.JIRA>
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References: <JIRA.13069541.1494009388000@Atlassian.JIRA> <JIRA.13069541.1494009388836@jira-lw-us.apache.org>
Subject: [jira] [Commented] (DRILL-5478) Spill file size parameter is not
 honored by the managed external sort
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archived-at: Tue, 19 Sep 2017 21:41:05 -0000


    [ https://issues.apache.org/jira/browse/DRILL-5478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16172380#comment-16172380 ] 

Robert Hou commented on DRILL-5478:
-----------------------------------

If this is exposed to Support, then it would be good to have some documentation about how this parameter works.  Maybe even just a comment that the parameter is not precise, and depends on the memory.

> Spill file size parameter is not honored by the managed external sort
> ---------------------------------------------------------------------
>
>                 Key: DRILL-5478
>                 URL: https://issues.apache.org/jira/browse/DRILL-5478
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Relational Operators
>    Affects Versions: 1.10.0
>            Reporter: Rahul Challapalli
>            Assignee: Paul Rogers
>             Fix For: 1.12.0
>
>
> git.commit.id.abbrev=1e0a14c
> Query:
> {code}
> ALTER SESSION SET `exec.sort.disable_managed` = false;
> alter session set `planner.width.max_per_node` = 1;
> alter session set `planner.disable_exchanges` = true;
> alter session set `planner.width.max_per_query` = 1;
> alter session set `planner.memory.max_query_memory_per_node` = 1052428800;
> alter session set `planner.enable_decimal_data_type` = true;
> select count(*) from (
>   select * from dfs.`/drill/testdata/resource-manager/all_types_large` d1
>   order by d1.map.missing
> ) d;
> {code}
> Boot Options (spill file size is set to 256MB)
> {code}
> 0: jdbc:drill:zk=10.10.100.190:5181> select * from sys.boot where name like '%spill%';
> +--------------------------------------------------+---------+-------+---------+----------+----------------------------------------------------+-----------+------------+
> |                       name                       |  kind   | type  | status  | num_val  |                     string_val                     | bool_val  | float_val  |
> +--------------------------------------------------+---------+-------+---------+----------+----------------------------------------------------+-----------+------------+
> | drill.exec.sort.external.spill.directories       | STRING  | BOOT  | BOOT    | null     | [
>     # drill-override.conf: 26
>     "/tmp/test"
> ]  | null      | null       |
> | drill.exec.sort.external.spill.file_size         | STRING  | BOOT  | BOOT    | null     | "256M"                                             | null      | null       |
> | drill.exec.sort.external.spill.fs                | STRING  | BOOT  | BOOT    | null     | "maprfs:///"                                       | null      | null       |
> | drill.exec.sort.external.spill.group.size        | LONG    | BOOT  | BOOT    | 40000    | null                                               | null      | null       |
> | drill.exec.sort.external.spill.merge_batch_size  | STRING  | BOOT  | BOOT    | null     | "16M"                                              | null      | null       |
> | drill.exec.sort.external.spill.spill_batch_size  | STRING  | BOOT  | BOOT    | null     | "8M"                                               | null      | null       |
> | drill.exec.sort.external.spill.threshold         | LONG    | BOOT  | BOOT    | 40000    | null                                               | null      | null       |
> +--------------------------------------------------+---------+-------+---------+----------+----------------------------------------------------+-----------+------------+
> {code}
> Below are the spill files while the query is still executing. The size of the spill files is ~34MB
> {code}
> -rwxr-xr-x   3 root root   34957815 2017-05-05 11:26 /tmp/test/26f33c36-4235-3531-aeaa-2c73dc4ddeb5_major0_minor0_op5_sort/run1
> -rwxr-xr-x   3 root root   34957815 2017-05-05 11:27 /tmp/test/26f33c36-4235-3531-aeaa-2c73dc4ddeb5_major0_minor0_op5_sort/run2
> -rwxr-xr-x   3 root root          0 2017-05-05 11:27 /tmp/test/26f33c36-4235-3531-aeaa-2c73dc4ddeb5_major0_minor0_op5_sort/run3
> {code}
> The data set is too large to attach here. Reach out to me if you need anything


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