![]() ![]() Instant file initialization is in use for General Purpose and Business Critical tiers of Azure SQL Database only to benefit the growth of transaction log files.Instant file initialization is allowed for transaction log growth on databases that have transparent data encryption (TDE) enabled, due to the nature of how the transaction log file is expanded, and the fact that the transaction log is written into in a serial fashion. Transaction log file autogrowth events larger than 64 MB can't benefit from instant file initialization. The default auto growth size increment for new databases is 64 MB. However, starting with SQL Server 2022 (16.x) (all editions) and in Azure SQL Database, instant file initialization can benefit from transaction log autogrowth events up to 64 MB. Historically, transaction log files couldn't be initialized instantaneously. Instant file initialization and the transaction logĪpplies to: SQL Server 2022 (16.x) and later versions, and Azure SQL Database. Instead, disk content is overwritten as new data is written to the files. In SQL Server, instant file initialization allows for faster execution of the previously mentioned file operations, since it reclaims used disk space without filling that space with zeros. Increase the size of an existing file (including autogrow operations).Add data or log files, to an existing database.Data and log files are first initialized by zeroing the files (filling with zeros) when you perform the following operations: In this article, you learn about instant file initialization (IFI) and how to enable it to speed up growth for your SQL Server database files.īy default, data and log files are initialized to overwrite any existing data left on the disk from previously deleted files. Applies to: SQL Server Azure SQL Database
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