database log file

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database log file

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sqlfriends

Posted Tuesday, December 04, 2012 6:30 PM

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If a database is setup to readonly and in simple recovery mode.

Will the log file grow or not?

thanks

Post #1392760

Lynn Pettis

Posted Tuesday, December 04, 2012 6:48 PM

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It shouldn't since you can't run insert, update, or delete statements. In addition you can't update the statistics or reorganize or rebuild indexes.

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Lynn Pettis

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Managing Transaction Logs

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Post #1392763

Bhuvnesh

Posted Wednesday, December 05, 2012 3:21 AM

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sqlfriends (12/4/2012)

If a database is setup to readonly.
Will the log file grow or not?

thanks

sqlfriends (12/4/2012)

If a database is setup in simple recovery mode.

Will the log file grow or not?

thanks

Yes

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Post #1392881

sqlfriends

Posted Wednesday, December 05, 2012 4:17 PM

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So if a database is set to read only , and by just querying the database, it won't create any log transactions, so no affect on log file, is that correct?

Thanks,

Post #1393262

George M Parker

Posted Wednesday, December 05, 2012 4:30 PM

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sqlfriends (12/5/2012)

So if a database is set to read only , and by just querying the database, it won't create any log transactions, so no affect on log file, is that correct?

Thanks,

That is correct. You can confirm that using fn_dblog(null,null).

USE [master]
GO
ALTER DATABASE [DBA_Rep] SET READ_ONLY WITH ROLLBACK IMMEDIATE
GO

SELECT * FROM fn_dblog(null,null)
Returned 3 transaction log records in my development environment

SELECT * FROM dbo.Backup_History

SELECT * FROM fn_dblog(null,null)
Returned the same 3 transaction log records

Post #1393265

GilaMonster

Posted Thursday, December 06, 2012 1:52 AM

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sqlfriends (12/5/2012)

So if a database is set to read only , and by just querying the database, it won't create any log transactions, so no affect on log file, is that correct?

Selects are never logged, in any recovery model in any database setting. Database changes are what are logged. A read only database can't be changed and hence won't get any log records.

Gail Shaw
Microsoft Certified Master: SQL Server 2008, MVP
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Post #1393371

sqlfriends

Posted Thursday, December 06, 2012 12:29 PM

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Thanks much, that helps

Post #1393701

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