dynamic_pager......
The dynamic_pager daemon manages a pool of external swap files which the kernel uses to support demand paging. This pool is expanded with new swap files as load on the system increases.  It is contracted when the swapping resources are no longer needed.  The dynamic_pager daemon also provides a notification service for those applications which wish to receive notices when the external paging pool expands or contracts.

cfprefsd processes.....
In prior versions of OS X, preferences files were always read by the application at launch. So as long as the app wasn’t running, if you replaced its preference file, it would read the new file the next time you launched the program. In Mavericks an later, preferences are managed by a background daemon, cfprefsd. This service reads the preferences file once, when you first run the app. It then (I believe) receives notifications if you change the program’s settings while the program is running, and then writes them to the actual preferences file at certain points in time. But cfprefsd always has a copy of those settings in its cache, and that’s what the app gets when it checks its settings. This reduces hard disk access, which is important in conserving battery life in laptops.

The API documentation states that the cache is synchronized with the on-disk plist file contents periodically, but does not indicate how often, let alone how to flush the cache manually.

Requies OS X 10.8 or later.