paleolimbot opened a new pull request #12633:
URL: https://github.com/apache/arrow/pull/12633
As noted in ARROW-15929, we have code referring to the wrong thread pool
(i.e., `arrow::io_thread_count()` and `arrow::set_io_thread_count()` are
actually setting the number of cores used instead of the actual thread count).
This appears to have been an inadvertent addition changed in ARROW-12760
(#10316).
``` r
# remotes::install_github("apache/arrow/r")
library(arrow, warn.conflicts = FALSE)
cpu_count()
#> [1] 8
set_io_thread_count(4)
cpu_count()
#> [1] 4
```
This PR switches that so that we're referring to the correct thread pool:
``` r
# remotes::install_github("paleolimbot/arrow/r@r-thread-io-pool-count")
library(arrow, warn.conflicts = FALSE)
cpu_count()
#> [1] 8
set_io_thread_count(4)
cpu_count()
#> [1] 8
io_thread_count()
#> [1] 4
```
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