# How to use multithread in IJulia

**URL:** <https://discourse.julialang.org/t/how-to-use-multithread-in-ijulia/24703>\
**Category:** General Usage\
**Tags:** jupyter, multithreading\
**Created:** [May 28, 2019, 5:49pm UTC](https://discourse.julialang.org/t/how-to-use-multithread-in-ijulia/24703 "2019-05-28T17:49:07Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![VincentTam](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/vincenttam/32/8358_2.png) [@VincentTam](https://discourse.julialang.org/u/VincentTam)\
**Post date:** [May 28, 2019, 5:49pm UTC](https://discourse.julialang.org/t/how-to-use-multithread-in-ijulia/24703/1 "2019-05-28T17:49:07Z")

</div>

I tried running `julia -p2`, `using IJulia` and `notebook()`, then in my notebook, I ran `nprocs()`, but it says the function is undefined.

---

<div class="post-metadata">

**Author:** ![baggepinnen](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/baggepinnen/32/693_2.png) [@baggepinnen](https://discourse.julialang.org/u/baggepinnen)\
**Post date:** [May 28, 2019, 5:54pm UTC](https://discourse.julialang.org/t/how-to-use-multithread-in-ijulia/24703/2 "2019-05-28T17:54:59Z")

</div>

You need to  
`using Distributed`

---

<div class="post-metadata">

**Author:** ![VincentTam](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/vincenttam/32/8358_2.png) [@VincentTam](https://discourse.julialang.org/u/VincentTam)\
**Post date:** [May 28, 2019, 6:16pm UTC](https://discourse.julialang.org/t/how-to-use-multithread-in-ijulia/24703/3 "2019-05-28T18:16:32Z")

</div>

Thanks! This saves the day.