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Optimize heatmap query (#33853)

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When there are over 5M records on `action` table, the heatmap on
dashboard is very slow as below SQL.
```
database duration=1.8881s db.sql="SELECT created_unix DIV 900 * 900 AS timestamp, count(user_id) as contributions FROM `action` WHERE user_id=? AND act_user_id=? AND (created_unix > ?) GROUP BY timestamp ORDER BY timestamp"
```

This PR add a new index for `action` table with columns `user_id`,
`act_user_id` and `created_unix` so that this query will become about 6
times faster than before.
This commit is contained in:
Lunny Xiao
2025-03-20 09:30:45 -07:00
committed by GitHub
parent 5407382b43
commit 4a7ab0abf0
3 changed files with 61 additions and 1 deletions
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5
models/activities/action.go
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@@ -172,7 +172,10 @@ func (a *Action) TableIndices() []*schemas.Index {
cuIndex := schemas.NewIndex("c_u", schemas.IndexType)
cuIndex.AddColumn("user_id", "is_deleted")
indices := []*schemas.Index{actUserIndex, repoIndex, cudIndex, cuIndex}
actUserUserIndex := schemas.NewIndex("au_c_u", schemas.IndexType)
actUserUserIndex.AddColumn("act_user_id", "created_unix", "user_id")
indices := []*schemas.Index{actUserIndex, repoIndex, cudIndex, cuIndex, actUserUserIndex}
return indices
}