> For the complete documentation index, see [llms.txt](https://docs.apppaas.com/start/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apppaas.com/start/jp/apppaas-guide/tosukringu.md).
# オートスケーリング（自動拡張）設定
### **概要**
***
オートスケーリング（自動拡張）は、サービス運営中に負荷が発生した場合、\
あらかじめ設定した値に従って自動的にサービスのサーバーを拡張または縮小し、\
サービスを安定的に維持できるようにする機能です。
AppPaaSでは、CPUの負荷率に応じて、1台から最大5台までサーバーが拡張されます。
{% hint style="info" %}
ベータサービスでは、最大5台まで設定可能です。
{% endhint %}
拡張されたサーバーの負荷率が低下した場合、自動的に縮小されます。\
拡張と縮小に関する情報は[サービスモニタリング](/start/jp/apppaas-guide/sbisumonitaringu.md)で確認できます。
---
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