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mssqlserver-854-database-engine-error.md

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title description author ms.author ms.reviewer ms.date ms.service ms.subservice ms.topic helpviewer_keywords
MSSQLSERVER_854
MSSQLSERVER_854
suresh-kandoth
sureshka
jopilov, mathoma
08/20/2020
sql
supportability
reference
854 (Database Engine error)

MSSQLSERVER_854

[!INCLUDE SQL Server]

Details

Attribute Value
Product Name SQL Server
Event ID 854
Event Source MSSQLSERVER
Component SQLEngine
Symbolic Name HARDWARE_MEMORY_SCRUBBER
Message Text Machine supports memory error recovery. SQL memory protection is enabled to recover from memory corruption

Explanation

This message indicates the the hardware in the operating system supports the ability to recover from memory errors. On computers that have newer hardware and are running Windows Server 2012 or a later version, the hardware can notify the operating system and applications that memory pages (operating system pages) are marked as bad or damaged. Applications such as [!INCLUDEssNoVersion] can register these bad memory page notifications by using the following API set:

  • GetMemoryErrorHandlingCapabilities
  • RegisterBadMemoryNotification
  • BadMemoryCallbackRoutine

[!INCLUDEssNoVersion] adds support for these notifications in Microsoft [!INCLUDEssNoVersion] 2012 and later versions. During [!INCLUDEssNoVersion] startup, [!INCLUDEssNoVersion] checks whether the hardware supports this new feature. Additionally, you receive the following message in the error log:

<Datetime> Server Machine supports memory error recovery. SQL memory protection is enabled to recover from memory corruption.

User action

Check if you are encountering other errors like 855 and 856 and take appropriate corrective action.

More information

You can use [!INCLUDEssNoVersion] trace flag 849 to keep [!INCLUDEssNoVersion] from registering with the operating system for memory error notifications. However, be aware that enabling trace flag 849 will prevent [!INCLUDEssNoVersion] from receiving bad memory notifications from operating system. Therefore, we do not recommend that you use this trace flag under typical circumstances.