The page file size may become alternately too small or too large when you start Windows Server 2008 or Windows Vista if there is no available free disk space, and the page file size is managed by the system
Consider the following scenario:
- On a computer that is running Windows Server 2008 or Windows Vista, a page file is configured on a hard disk drive.
- The page file is configured to use the System managed size option.
- The free disk space is not enough to hold the page file.
In this scenario, you find that the page file size is alternately too small or too large at each startup. Or, no page file is generated. Also, because of the incorrect page file size, a dump file may not be generated.
Additionally, the following event error is logged in the System event log:
Event ID: 49
Configuring the Page file for crash dump failed. Make sure there is a page file on the boot partition and that is large enough to contain all physical memory.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB955635.