[DRILL-5478] Spill file size parameter is not honored by the managed external sort

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.10.0
• Fix Version/s: 1.12.0
• Component/s: Documentation, Execution - Relational Operators
• Assignee: Paul Rogers
• Reporter: Rahul Kumar Challapalli
• Created: 05/May/17 18:36
• Updated: 19/Oct/17 00:43
• Resolved: 17/Aug/17 03:33

Description

git.commit.id.abbrev=1e0a14c

Query:

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;

Boot Options (spill file size is set to 256MB)

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       |
+--------------------------------------------------+---------+-------+---------+----------+----------------------------------------------------+-----------+------------+

Below are the spill files while the query is still executing. The size of the spill files is ~34MB

-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

The data set is too large to attach here. Reach out to me if you need anything

Issue Links

• Is contained by: DRILL-5601 Rollup of External Sort memory management fixes