Resource Throttling in SharePoint 2013

• monitoring and throttling server resources and large lists for Web applications. 
• its enables you to control resource utilization during peak usage and prevent user activity from negatively affecting server performance. 

1. General Settings Ribbon, select Resource Throttling.
2. Enter values for the List View Threshold option.
3.  This limits queries within a list to guard against performance degradation with too many list items. 
4. In SharePoint Server 2013, a list can support up to 50 million items.