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Jan 24, 2024
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Add some explanation for tiflash tuning performance doc #16045

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add translation
CrystalAnalyst Jan 1, 2024
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Merge branch 'pingcap:master' into translate
CrystalAnalyst Jan 9, 2024
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add some explanation for tiflash tuning performance doc
CrystalAnalyst Jan 9, 2024
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Oreoxmt Jan 24, 2024
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2 changes: 1 addition & 1 deletion tiflash/tune-tiflash-performance.md
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Expand Up @@ -305,7 +305,7 @@ The [`tidb_max_tiflash_threads`](/system-variables.md#tidb_max_tiflash_threads-n
set @@tidb_max_tiflash_threads = 20;
```

The following example shows the query result before and after `tidb_max_tiflash_threads` is re-configured. Before the re-configuration, the execution concurrency of all TiFlash operators is 24. After the value of this variable changes to `20`, the concurrency becomes 60.
The following example shows the query result before and after `tidb_max_tiflash_threads` is re-configured. Before `tidb_max_tiflash_threads` is set, the concurrency of request execution for a single TiFlash instance is 8 threads. Since the cluster has a total of 3 TiFlash instances, the total number of threads for request execution on all TiFlash instances is 24 (8 × 3). After `tidb_max_tiflash_threads` is set to `20`, the total number of threads for request execution on all TiFlash instances is 60 (20 × 3).

Before `tidb_max_tiflash_threads` is re-configured:

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