This setting automatically selects the best page file size, depending on the frequency of system crashes. This setting is an alternative to a kind of crash dump. The Automatic memory dump setting is enabled by default. * 1 MB of header data and device drivers can total 256 MB of secondary crash dump data. System crash dump settingĭepends on kernel virtual memory usage. This assumes that enough free disk space exists. Otherwise, the system can't create the crash dump file.ĭuring startup, system-managed page files are sized respective to the system crash dump settings. Therefore, a page file or a dedicated dump file must be large enough to support the kind of crash dump selected. A page file or dedicated dump file is used to write a crash dump file (Memory.dmp) to disk. The dump file that is produced from this event is called a system crash dump. The existing page files are fairly full (\Paging Files(*)% Usage).Ī system crash (also known as a “bug check” or a "Stop error") occurs when the system can't run correctly. The modified page list contains a significant amount of memory. More available physical memory (\Memory\Available MBytes) is required. Therefore, consider extending or adding a page file if all the following conditions are true: Typically, several hundred megabytes of memory remains resident on the modified list. However, not all the memory on the modified page list is written out to disk. The "\Memory\Modified Page List Bytes" performance counter measures, in part, the number of infrequently accessed modified pages that are destined for the hard disk. This removal provides more available space for more frequently accessed pages. The purpose of a page file is to back (support) infrequently accessed modified pages so that they can be removed from physical memory. Therefore, physical memory and page file sizing also vary. Peak system-committed memory usage can vary greatly between systems. If no page files exist, the system commit limit is slightly less than the physical memory that is installed. This limit is the sum of physical memory (RAM) and all page files combined. The system commit charge can't exceed the system commit limit. Otherwise, a system memory dump file isn't created.įor more information, see Support for system crash dumps section. If you want a crash dump file to be created during a system crash, a page file or a dedicated dump file must exist and be large enough to back up the system crash dump setting. Use the following considerations for page file sizing for all versions of Windows and Windows Server. This uniqueness means that page file sizing is also unique to each system and can't be generalized. Both considerations are unique to each system, even for systems that are identical. Page file sizing depends on the system crash dump setting requirements and the peak usage or expected peak usage of the system commit charge.
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