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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2020/06/29 08:42:32 UTC
[GitHub] [incubator-doris] yangzhg opened a new pull request #3974: Improve performance of unique table read
yangzhg opened a new pull request #3974:
URL: https://github.com/apache/incubator-doris/pull/3974
Implements #3971
the test table as list:
```
mysql> desc test;
+------------+---------+------+-------+---------+---------+
| Field | Type | Null | Key | Default | Extra |
+------------+---------+------+-------+---------+---------+
| rid | BIGINT | No | true | 0 | |
| qid | BIGINT | No | true | 0 | |
| qidDeleted | TINYINT | No | false | 0 | REPLACE |
| type | TINYINT | No | false | 0 | REPLACE |
| uid | BIGINT | No | false | 0 | REPLACE |
| toUid | BIGINT | No | false | 0 | REPLACE |
| status | INT | No | false | 0 | REPLACE |
| createTime | INT | No | false | 0 | REPLACE |
| source | INT | No | false | 0 | REPLACE |
| misFlag | INT | No | false | 0 | REPLACE |
| anonymous | TINYINT | No | false | 0 | REPLACE |
| uv | TINYINT | No | false | 1 | REPLACE |
+------------+---------+------+-------+---------+---------+
12 rows in set (0.00 sec)
mysql> select count(*) from test;
+----------+
| count(*) |
+----------+
| 1093760 |
+----------+
1 row in set (1.00 sec)
```
There is 29 versions at present
I run the query `select sum(uv) from test` for 10 times,
the average ScanTime reduced from `9s277ms` to `8s206ms`
9277.2
--
9277.2
--
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[GitHub] [incubator-doris] morningman merged pull request #3974: Improve performance of unique table read
Posted by GitBox <gi...@apache.org>.
morningman merged pull request #3974:
URL: https://github.com/apache/incubator-doris/pull/3974
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