In this article I am going to explain about Throttling
in SharePoint. throttling is a new
feature in SharePoint 2010 lists.
This
allow SharePoint administrator to impose limits on the number of items returned
by list queries from a list.
Now we will see this setting step by step:
Open up the SharePoint
2010 Central Administration website.

Image 1.
Click Here Application
Management.

Image 2.
Click Manage Web
application here.

Image 3.
Select your SharePoint
site -> Click on General Setting -> Click on Resource Throttling.
It may be a you can get
below screen after clicking here.

Image 4.
No need to worry. Follow
below steps:
Open SharePoint 2010 Management PowerShell and do the below code
:
$w = get-spwebapplication http://Site_URL
$w.HttpThrottleSettings
$w.Update()
Now again select your SharePoint site -> Click on General Setting -> Click
on Resource Throttling.

Image 5.

Image 6.

Image 7.
Do the settings as you
want.
Below is the description
of all settings:
- List View Threshold: Defaults to 5000.
- Object Model Override: Yes/No radio buttons. The default value is Yes.
- List View Threshold for Auditors and Administrators: Defaults to 20000.
- List View Lookup threshold: Defaults to 6.
- Daily Time Window for Large Queries: Check this option which, when enabled,
allows setting of a start time and a maximum duration.
- List Unique Permissions Threshold: Defaults to 50000.
- Backward-Compatible Event Handlers: On/Off radio buttons. Defaults to Off.
- HTTP Request Monitoring and Throttling: On/Off radio buttons. Defaults to On.
- Change Log: Defaults to 60 days after which log entries are deleted. Can be set
to Never.