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- DOCUMENT:Q103097 27-SEP-1993 [W_NT]
- TITLE :Access Violation (C0-C5) During Registry Backup or Save
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- ----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system, version 3.1
- - Microsoft Windows NT Advanced Server, version 3.1
- ----------------------------------------------------------------------
-
- WARNING: Using Registry Editor incorrectly can cause
- serious, system-wide problems that may require you to
- reinstall Windows NT to correct them. Microsoft cannot
- guarantee that any problems resulting from the use of
- Registry Editor can be solved. Use this tool at your own
- risk.
-
- SYMPTOMS
- ========
-
- During a backup or save of the Registry or one of its hives, an error
- message is displayed on a blue screen and your system is halted. The
- error message states that an access violation occurred (C0-C5). If you
- perform a trace of the stack using Kernel Debugger, the Registry shows
- up.
-
- CAUSE
- =====
-
- The Registry has reached its capacity given its current Registry size
- limit (RSL) and other system configuration factors. The RSL represents
- the maximum size the Registry can reach and is 25 percent of the
- paging file, by default. Since the paging file, by default, is 32 MB,
- the default RSL is roughly 8 megabytes (MB). The default RSL is big
- enough to store approximately 5000 users in the security accounts
- manager (SAM) database. There is no guarantee that the amount of
- memory specified by the RSL will be available.
-
- RESOLUTION
- ==========
-
- To avoid this problem, you must increase the RSL by either manually
- editing the Registry entry for the RSL or by increasing the size of
- the paging file. You can increase the size of the paging file by using
- Control Panel. To modify the RSL in the Registry, do the following:
-
-
- 1. Start Registry Editor (REGEDT32.EXE) and go to the following hive
- and subkey:
-
- HKEY_LOCAL_MACHINE, System\CurrentControlSet\Control
-
- 2. Select the RegistrySizeLimit value and Choose Edit Value from the
- Edit menu. If the RegistrySizeLimit value is not present, enter it
- by choosing Add Value from the edit menu and use the following
- information:
-
- RegistrySizeLimit : REG_DWORD : <bytes>
-
- 3. Enter the number of bytes for the RSL for the value of the
- RegistrySizeLimit value.
-
- 4. Exit Registry Editor and shut down Windows NT.
-
- Registry Size Limit Notes
- =========================
-
- The RSL is a maximum boundary, not an allocation. Setting a large RSL
- does not mean the system will use the specified amount of space unless
- the Registry requires it; similarly, it does not imply that the
- specified amount will be available.
-
- If you set the RSL to a value less than 4 MB, it will round up to 4
- MB. If it is greater than 80% of the paging file, it will be reduced
- to just 80% of the paging file.
-
- Setting the RSL to 0xffffffff instructs Windows NT to use as much of
- the paging file as it can (80%). Since the paging file has a maximum
- size of 128 MB, the RSL can be no larger than about 102 MB which would
- support about 80,000 users in the SAM database.
-
- The limitations imposed by the RSL are approximate.
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: KEYREG STOPSCRN
-
- =============================================================================
-
- THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
- PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
- ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
- EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
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- OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
- SO THE FOREGOING LIMITATION MAY NOT APPLY.
-
- Copyright Microsoft Corporation 1993.