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Expand Rails guide to include note on cleaning up old query stats #491

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Expand Rails guide to include note on cleaning up old query stats #491

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14 changes: 14 additions & 0 deletions guides/Rails.md
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Expand Up @@ -82,6 +82,20 @@ or:
PgHero.clean_query_stats
```

Schedule a task to remove old stats once a week.
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@ankane would you agree this is a reasonable recommendation?


By default, query stats older than 14 days will be deleted. Change this with:

```ruby
ENV["KEEP_DAYS"]
```

or:

```ruby
PgHero.clean_query_stats(before: 30)
```

By default, query stats are stored in your app’s database. Change this with:

```ruby
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