alamb commented on a change in pull request #683:
URL: https://github.com/apache/arrow-datafusion/pull/683#discussion_r664761587
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File path: datafusion/src/execution/context.rs
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@@ -639,6 +641,7 @@ impl Default for ExecutionConfig {
fn default() -> Self {
Self {
concurrency: num_cpus::get(),
+ partitions: num_cpus::get(),
Review comment:
For backwards compatibility what would you think about defaulting
`partitions` to `None` and if it was not set using the value for `concurrency`
instead? Otherwise users may have to tune two separate knobs when they may just
want a big hammer "how many cores should data fusion try and keep busy"
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