# Rolling Update Batch Size Question

**URL:** <https://forum.ansible.com/t/rolling-update-batch-size-question/27912>\
**Category:** Ansible Project\
**Created:** [June 29, 2018, 8:33am UTC](https://forum.ansible.com/t/rolling-update-batch-size-question/27912 "2018-06-29T08:33:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![muhammed](https://avatars.discourse-cdn.com/v4/letter/m/c67d28/32.png) [@muhammed](https://forum.ansible.com/u/muhammed)\
**Post date:** [June 29, 2018, 8:33am UTC](https://forum.ansible.com/t/rolling-update-batch-size-question/27912/1 "2018-06-29T08:33:18Z")

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The example in the documentation is as follows:

`

```auto
- name: test play
  hosts: webservers
  serial:
  - 1
  - 5
  - "20%"

```

`

With regards to the the last item (20%) - will this only perform actions on the remaining 20% or will it repeatedly do 20% of hosts until the end ? If I changed 20% to 100%, would it then action the tasks on all **remaining** hosts (excluding the 6 that have already completed) ?

Thanks in advance.

---

<div class="post-metadata">

**Author:** ![Kai\_Stian\_Olstad](https://avatars.discourse-cdn.com/v4/letter/k/e19adc/32.png) [@Kai\_Stian\_Olstad](https://forum.ansible.com/u/Kai_Stian_Olstad)\
**Post date:** [June 29, 2018, 6:04pm UTC](https://forum.ansible.com/t/rolling-update-batch-size-question/27912/2 "2018-06-29T18:04:10Z")

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The documentation also cover that  
"The serial keyword can also be specified as a percentage, which will be applied to the total number of hosts in a play"