[ https://issues.apache.org/jira/browse/DRILL-5453?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Paul Rogers reassigned DRILL-5453: ---------------------------------- Assignee: Paul Rogers > Managed External Sort : Sorting on a lot of columns is taking unreasonably > long time > ------------------------------------------------------------------------------------ > > Key: DRILL-5453 > URL: https://issues.apache.org/jira/browse/DRILL-5453 > Project: Apache Drill > Issue Type: Bug > Components: Execution - Relational Operators > Affects Versions: 1.10.0 > Reporter: Rahul Challapalli > Assignee: Paul Rogers > Attachments: drill5453.sys.drill > > > The below query ran for ~16hrs before I cancelled it. > {code} > ALTER SESSION SET `exec.sort.disable_managed` = false; > alter session set `planner.memory.max_query_memory_per_node` = 482344960; > alter session set `planner.width.max_per_node` = 1; > alter session set `planner.width.max_per_query` = 1; > select count(*) from (select * from > dfs.`/drill/testdata/resource-manager/3500cols.tbl` order by > columns[450],columns[330],columns[230],columns[220],columns[110],columns[90],columns[80],columns[70],columns[40],columns[10],columns[20],columns[30],columns[40],columns[50], > > columns[454],columns[413],columns[940],columns[834],columns[73],columns[140],columns[104],columns[2222],columns[30],columns[2420],columns[1520], > columns[1410], > columns[1110],columns[1290],columns[2380],columns[705],columns[45],columns[1054],columns[2430],columns[420],columns[404],columns[3350], > > columns[3333],columns[153],columns[356],columns[84],columns[745],columns[1450],columns[103],columns[2065],columns[343],columns[3420],columns[530], > columns[3210] ) d where d.col433 = 'sjka skjf'; > alter session set `planner.memory.max_query_memory_per_node` = 2147483648; > {code} > The data set and the logs are too large to attach to a jira. But below is a > description of the data > {code} > No of records : 1,000,000 > No of columns : 3500 > Length of each column : < 50 > {code} > The profile is attached and I will give my analysis on why I think its an > un-reasonable amount of time soon. -- This message was sent by Atlassian JIRA (v6.4.14#64029)