[GitHub] [arrow-datafusion] mingmwang opened a new issue #1452: [Question] I'm doing some benchmark test(TPCH) on DataFusion, is there a way to run the benchmark in a single thread?

[GitBox <gi...@apache.org>]

mingmwang opened a new issue #1452:
URL: https://github.com/apache/arrow-datafusion/issues/1452


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[GitHub] [arrow-datafusion] alamb commented on issue #1452: [Question] I'm doing some benchmark test(TPCH) on DataFusion, is there a way to run the benchmark in a single thread?

[GitBox <gi...@apache.org>]

alamb commented on issue #1452:
URL: https://github.com/apache/arrow-datafusion/issues/1452#issuecomment-995216123


   Hi @mingmwang  -- I think setting `partitions` to `1` is the closest we have at the moment
   
   So something like
   ```shell
   ./target/debug/tpch benchmark datafusion -n 1 ...
   ```


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[GitHub] [arrow-datafusion] alamb commented on issue #1452: [Question] I'm doing some benchmark test(TPCH) on DataFusion, is there a way to run the benchmark in a single thread?

[GitBox <gi...@apache.org>]

alamb commented on issue #1452:
URL: https://github.com/apache/arrow-datafusion/issues/1452#issuecomment-995217425


   If you want to ensure only a single thread is used, you can set the tokio runtime to use a single thread
   
   Something like modify https://github.com/apache/arrow-datafusion/blob/7996fa86720fd96628bc07b7ee3f226107b7f969/benchmarks/src/bin/tpch.rs#L187-L189
   
   And change 
   
   ```rust
   #[tokio::main]
   ```
   
   to 
   ```rust
   #[tokio::main(core_threads = 1, max_threads = 1)]
   ```


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