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TiFlash: remove outdated tune advise #6133

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ti-chi-bot merged 1 commit into from
Aug 10, 2021
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TiFlash: remove outdated tune advise #6133

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12 changes: 1 addition & 11 deletions tiflash/tune-tiflash-performance.md
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Expand Up @@ -52,14 +52,4 @@ If you want to save machine resources and have no requirement on isolation, you

```sql
set @@tidb_opt_distinct_agg_push_down = 1;
```

5. If the `JOIN` operator does not choose the MPP mode, you can modify the value of `tidb_opt_network_factor` to make the`JOIN` operator choose the MPP mode:

The variable `tidb_opt_network_factor` is used to set the ratio of network overhead that the optimizer takes into account when calculating the cost. The smaller the variable value is, the smaller the estimated cost for a large amount of network transmissions is, and the more TiDB inclined to choose the MPP operator.

{{< copyable "sql" >}}

```sql
set @@tidb_opt_network_factor = 0.001;
```
```