Cocoon 2.2: configuring and using persistent store/cache

Hello, I am new in cocoon. Right now I try to understand how cache worked in cocoon and want to configure the persistent store. I already search around in internet and mailing list. And I found that other people asking this question too like this:

Cocoon 2.2: configuring and using persistent store/cache

Hello, can someone give a small example of how to configure cocoon to use the FileSystemStore? I cannot find any documentation for cocoon 2.2, only for older versions. I don't know in which files the configuration should be placed. What do I need to change in the sitemap to use the