[
https://issues.apache.org/jira/browse/PHOENIX-889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Maryann Xue closed PHOENIX-889.
-------------------------------
Assignee: Maryann Xue
> Query performance with Join feature is poor
> -------------------------------------------
>
> Key: PHOENIX-889
> URL: https://issues.apache.org/jira/browse/PHOENIX-889
> Project: Phoenix
> Issue Type: Improvement
> Affects Versions: 3.0.0
> Reporter: yang ming
> Assignee: Maryann Xue
>
> h3.Table DDL
> Table1:
> create table if not exists yk.video_summary
> (
> videoid integer not null,
> date date not null,
> platform varchar not null,
> device varchar not null,
> systemgroup varchar not null,
> system varchar not null,
> vv bigint
> constraint pk primary key (videoid, date,platform, device, systemgroup,system)
> )salt_buckets = 30,versions=1,compression='snappy';
> Table2:
> create table if not exists yk.video_meta(
> videoid integer not null,
> showid integer not null,
> title varchar not null,
> showvideotype varchar not null,
> publishtime date not null
> constraint pk primary key (videoid,showid,showvideotype,publishtime)
> ) salt_buckets = 10,versions=1,compression='snappy';
> h3.Queries
> Query1:
> select videoid from YK.VIDEO_META where showid=99299;
> Result:
> +------------+
> | VIDEOID |
> +------------+
> | 137102991 |
> | 151113895 |
> | 171559204 |
> | 171559439 |
> | 171573932 |
> | 171574082 |
> | 171574164 |
> | 171643206 |
> | 171677219 |
> | 171764188 |
> | 171794335 |
> | 171874661 |
> +------------+
> Query2:
> select date,sum(vv) as sv from YK.VIDEO_SUMMARY where videoid in
> (137102991,151113895,171559204,171559439,171573932,171574082,171574164,171643206,171677219,171764188,171794335,171874661)
> and date>=to_date('2014-03-17','yyyy-MM-dd') and
> date<=to_date('2014-03-23','yyyy-MM-dd') group by date order by date desc;
> Result(cost 3s):
> +---------------------+------------+
> | DATE | SV |
> +---------------------+------------+
> | 2014-03-23 | 2795341 |
> | 2014-03-22 | 3111076 |
> | 2014-03-21 | 3588108 |
> | 2014-03-20 | 5972243 |
> | 2014-03-19 | 5192865 |
> | 2014-03-18 | 2848761 |
> | 2014-03-17 | 8922 |
> +---------------------+------------+
> Query3:
> select a.date,sum(a.vv) as sv from YK.VIDEO_SUMMARY as a inner join
> YK.VIDEO_META as b on (b.showid=99299 and a.videoid=b.videoid) where
> a.date>=to_date('2014-03-17','yyyy-MM-dd') and
> a.date<=to_date('2014-03-23','yyyy-MM-dd') group by a.date order by a.date
> desc;
> Result:
> {color:red}Not return results,the server load is high.I kill this
> query.{color}
> h3.The execution plan:
> Query2:
> +------------+
> | PLAN |
> +------------+
> | CLIENT PARALLEL 90-WAY SKIP SCAN ON 360 RANGES OVER YK.VIDEO_SUMMARY
> [0,137102991,'2014-03-17 00:00:00.000'] - [29,171874661,'2014-03-23
> 00:00:00.000'] |
> | SERVER AGGREGATE INTO DISTINCT ROWS BY [DATE] |
> | CLIENT MERGE SORT |
> | CLIENT SORTED BY [DATE DESC] |
> +------------+
> Query3:
> +------------+
> | PLAN |
> +------------+
> | CLIENT PARALLEL 240-WAY FULL SCAN OVER YK.VIDEO_SUMMARY |
> | SERVER FILTER BY (DATE >= '2014-03-17 00:00:00.000' AND DATE <=
> '2014-03-23 00:00:00.000') |
> | SERVER AGGREGATE INTO DISTINCT ROWS BY [DATE] |
> | CLIENT MERGE SORT |
> | CLIENT SORTED BY [DATE DESC] |
> | PARALLEL EQUI-JOIN 1 HASH TABLES: |
> | BUILD HASH TABLE 0 (SKIP MERGE) |
> | CLIENT PARALLEL 60-WAY FULL SCAN OVER YK.VIDEO_META |
> | SERVER FILTER BY FIRST KEY ONLY AND SHOWID = 99299 |
> | CLIENT MERGE SORT |
> +------------+
> {color:blue}Table YK.VIDEO_META is small. Query 3 with join is a full
> scan,it's performance is very poor!Is there any other suggestion?{color}
--
This message was sent by Atlassian JIRA
(v6.2#6252)
