A kernel memory dump is smaller than a full memory dump and typically accounts for about one-third of the physical memory installed on the system. For example, if you have 20 GB of RAM and Windows is using 10 GB during a system crash, the memory dump will be 10 GB. A complete memory dump contains a copy of all data used by Windows in physical memory.
Windows can create different types of memory dumps: Usually, the parameter 'Write debug information' is set to 'Automatic memory dump'. From here, select the System and Security section and then System, then click the Advanced System Settings tab and click Options under Startup and Recovery. The parameter memory dump can be found through the Control Panel.
