# Multi-threaded worker processes

**URL:** <https://discourse.julialang.org/t/multi-threaded-worker-processes/33034>\
**Category:** General Usage\
**Created:** [January 6, 2020, 5:03pm UTC](https://discourse.julialang.org/t/multi-threaded-worker-processes/33034 "2020-01-06T17:03:38Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![tkf](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tkf/32/17635_2.png) [@tkf](https://discourse.julialang.org/u/tkf)\
**Post date:** [January 9, 2020, 1:18am UTC](https://discourse.julialang.org/t/multi-threaded-worker-processes/33034/13 "2020-01-09T01:18:07Z")

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I just released a new version of Transducers.jl with a new `threads_basesize` option to [`dreduce`](https://tkf.github.io/Transducers.jl/dev/manual/#Transducers.dreduce). “Two-level” parallelism should automatically kick in if you set `JULIA_NUM_THREADS` appropriately in all workers; i.e., each worker process uses multiple threads. You can still force each worker process to use only one thread by setting `threads_basesize = typemax(Int)`.

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