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TruncateLogOnCheckpoint Property

Cette fonctionnalité sera supprimée dans une prochaine version de Microsoft SQL Server. Évitez d'utiliser cette fonctionnalité dans de nouveaux travaux de développement et prévoyez de modifier les applications qui utilisent actuellement cette fonctionnalité.

The TruncateLogOnCheckpoint property configures automatic transaction log maintenance activity.

Syntaxe

object.TruncateLogOnCheckpoint [= value]

Parts

  • object
    An expression that evaluates to an object in the Applies To list

  • value
    TRUE or FALSE

Data Type

Boolean

Modifiable

Read/write

Prototype (C/C++)

HRESULT GetTruncateLogOnCheckpoint(LPBOOL pRetVal);
HRESULT SetTruncateLogOnCheckpoint(BOOL NewValue);

Notes

Periodically, and on certain user-directed actions, Microsoft SQL Server forces a write of dirty pages, ensuring data integrity at a point in time. The recovery interval option configures periodic dirty page writes. The Transact-SQL statement CHECKPOINT and other user-directed actions, such as initiating a complete database backup, force a dirty page write.

If TRUE, SQL Server removes log entries referencing committed transactions when activity on the database forces a dirty page write.

If FALSE, the forced dirty page writes have no effect on the database transaction log.

Important

Setting the TruncateLogOnCheckpoint property to TRUE implies that backup-maintained database integrity relies on backup of the database only. If TRUE, you cannot back up a database transaction log, and backup strategies based on differential backup of the log are not available. For more information, see Définition des options de base de données.

Applies To:

DBOption Object