Cache in SharePoint 2010

SharePoint Provide 3 type of cache.  It helps the page to load speed.

1. BLOB cache:

2. Page Output cache:

3. Object cache:

BLOB Cache:

SharePoint Server 2010 provides a disk-based cache that stores files that are used by Web pages to help them load quickly in the browser, and reduces the load on the database server when it uses those files. These files are known as binary large objects (BLOBs), and the cache is known as the BLOB cache. The BLOB cache is stored directly on the hard disk drive of a front-end Web server computer.

You enable the BLOB cache in the Web.config file of the Web application to which you want to apply it. The changes that you make to the Web.config file will be applied to all site collections within the Web application. For information about the BLOB cache, see Plan for caching and performance (SharePoint Server 2010).

Page Output cache:

The page output cache stores the rendered output of a page. It also stores different versions of the cached page, based on the permissions of the users who are requesting the page. Page output cache settings can be configured at the site collection level, at the site level, and for page layouts. By default, the page output cache is turned off.

Object cache:

The object cache reduces the amount of traffic between the Web server and the SQL database by storing objects—such as lists and libraries, site settings, and page layouts—in memory on the front-end Web server computer.