- Windows 2000
- Windows XP
- Windows Server 2003
- Windows Vista
- Windows Server 2008
- Windows 7
- Windows Server 2008 R2
- Windows 8
- Windows Server 2012
- Windows 8.1
- Windows Server 2012 R2
Windows can generate any one of the following memory dump file types:
- Complete memory dump
- Kernel memory dump
- Small memory dump (64 KB)
- Automatic memory dump
Complete memory dumpA complete memory dump records all the contents of system memory when your computer stops unexpectedly. A complete memory dump may contain data from processes that were running when the memory dump was collected.
If you select the Complete memory dump option, you must have a paging file on the boot volume that is sufficient to hold all the physical RAM plus 1 megabyte (MB).
If a second problem occurs and another complete memory dump (or kernel memory dump) file is created, the previous file is overwritten.
- In Windows Vista, in Windows 7, in Windows Server 2008, and in Windows Server 2008 R2, the paging file can be on a partition that differs from the partition on which the operating system is installed.
- In Windows Vista and in Windows Server 2008, to put a paging file on another partition, you must create a new registry entry that is named DedicatedDumpFile. You can define the size of the paging file by using a new registry entry that is named DumpFileSize.
- For more information about how to do this, visit the following Microsoft Web site:
969028 How to generate a kernel or a complete memory dump file in Windows Server 2008
- For more information about how to do this, visit the following Microsoft Web site:
- In Windows 7 and in Windows Server 2008 R2, you do not have to use the DedicatedDumpFile registry entry to put a paging file onto another partition.
- The Complete memory dump option is not available on computers that are running a 32-bit operating system and that have 2 gigabytes (GB) or more of RAM. For more information, see the "Specify what happens when the system stops unexpectedly" topic on the following Microsoft TechNet Web site:
Kernel memory dumpA kernel memory dump records only the kernel memory. This speeds up the process of recording information in a log when your computer stops unexpectedly. You must have a pagefile large enough to accommodate your kernel memory. For 32-bit systems, kernel memory is usually between150MB and 2GB. Additionally, on Windows 2003 and Windows XP, the page file must be on the boot volume. Otherwise, a memory dump cannot be created.
This dump file does not include unallocated memory or any memory that is allocated to User-mode programs. It includes only memory that is allocated to the kernel and hardware abstraction layer (HAL) in Windows 2000 and later, and memory allocated to Kernel-mode drivers and other Kernel-mode programs. For most purposes, this dump file is the most useful. It is significantly smaller than the complete memory dump file, but it omits only those parts of memory that are unlikely to have been involved in the problem.
If a second problem occurs and another kernel memory dump file (or a complete memory dump file) is created, the previous file is overwritten when the 'Overwrite any existing file' setting is checked.
Small memory dumpA small memory dump records the smallest set of useful information that may help identify why your computer stopped unexpectedly. This option requires a paging file of at least 2 MB on the boot volume and specifies that Windows 2000 and later create a new file every time your computer stops unexpectedly. A history of these files is stored in a folder.
This dump file type includes the following information:
- The Stop message and its parameters and other data
- A list of loaded drivers
- The processor context (PRCB) for the processor that stopped
- The process information and kernel context (EPROCESS) for the process that stopped
- The process information and kernel context (ETHREAD) for the thread that stopped
- The Kernel-mode call stack for the thread that stopped
If a second problem occurs and a second small memory dump file is created, the previous file is preserved. Each additional file is given a distinct name. The date is encoded in the file name. For example, Mini022900-01.dmp is the first memory dump generated on February 29, 2000. A list of all small memory dump files is kept in the %SystemRoot%\Minidump folder.
Configure the dump typeTo configure startup and recovery options (including the dump type), follow these steps.
Note Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.
- Click Start, and then click Control Panel.
- Click Performance and Maintenance, and then click System.
- On the Advanced tab, click Settings under Startup and Recovery.
Tools for the various dump typesYou can load complete memory dumps and kernel memory dumps with standard symbolic debuggers, such as I386kd.exe. I386kd.exe is included with the Windows 2000 Support CD-ROM.
Load small memory dumps by using Dumpchk.exe. Dumpchk.exe is included with the Support Tools for Windows 2000 and Windows XP. You can also use Dumpchk.exe to verify that a memory dump file has been created correctly.
For more information about how to use Dumpchk.exe in Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
- Boot volume: The volume that contains the Windows operating system and its support files. The boot volume can be, but does not have to be, the same as the system volume.
- System volume: The volume that contains the hardware-specific files that you must have to load Windows. The system volume can be, but does not have to be, the same as the boot volume. The Boot.ini, Ntdetect.com, and Ntbootdd.sys files are examples of files that are located on the system volume.
Registry values for startup and recoveryThe following registry value is used:
CrashDumpEnabled REG_DWORD 0x0 = None
CrashDumpEnabled REG_DWORD 0x1 = Complete memory dump
CrashDumpEnabled REG_DWORD 0x2 = Kernel memory dump
CrashDumpEnabled REG_DWORD 0x3 = Small memory dump (64KB)
CrashDumpEnabled REG_DWORD 0x7 = Automatic memory dump
0x1 = Enabled
AutoReboot REG_DWORD 0x1
DumpFile REG_EXPAND_SZ %SystemRoot%\Memory.dmp
LogEvent REG_DWORD 0x1
MinidumpDir REG_EXPAND_SZ %SystemRoot%\Minidump
Overwrite REG_DWORD 0x1
SendAlert REG_DWORD 0x1
NOTE: You must restart Windows in order for your changes to take affect.
Test to make sure that a dump file can be createdFor more information about how to configure your computer to generate a dump file for testing purposes, click the following article number to view the article in the Microsoft Knowledge Base:
Default dump type options
- Windows 2000 Professional: Small memory dump (64 KB)
- Windows 2000 Server: Complete memory dump
- Windows 2000 Advanced Server: Complete memory dump
- Windows XP (Professional and Home Edition): Small memory dump (64 KB)
- Windows Server 2003 (All Editions): Complete memory dump
- Windows Vista (All Editions): Kernel memory dump
- Windows Server 2008 (All Editions): Kernel memory dump
- Windows 7 (All Editions): Kernel memory dump
- Windows Server 2008 R2 (All Editions): Kernel memory dump
- Windows 8 and 8.1 (All Editions): Automatic memory dump
- Windows Server 2012 and 2012 R2 (All Editions): Automatic memory.dmp
Maximum paging file sizeMaximum paging file size is limited as follows:
|Maximum size of a paging file||4 gigabytes (non-PAE)|
16 terabytes (PAE)
|16 terabytes||32 terabytes|
|Maximum number of paging files||16||16||16|
|Total paging file size||64 gigabytes (non-PAE)|
256 terabytes (PAE)
|256 terabytes||512 terabytes|
Technical support for x64-based versions of Microsoft WindowsYour hardware manufacturer provides technical support and assistance for x64-based versions of Windows. Your hardware manufacturer provides support because an x64-based version of Windows was included with your hardware. Your hardware manufacturer might have customized the installation of Windows with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your x64-based version of Windows. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware.
For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site:
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