具有巨大的日志文件的完全恢复

Question

In a sql server database with a full model backup with tran logs backed up every 15 minutes, but ,still, the log file is huge. I suspect I should act on the target recovery time parameter (60 sec actually) perhaps ..

[ recently I found a method to shrink it :

shrink the DB after doing the following task :

/* Perform a full backup of your database.

Change the backup method of your database to "Simple"

Open a query window and enter "checkpoint" and execute

Perform another backup of the database

Perform a final full backup of the database. */

Answer 1

The transaction log backup will not shrink the files. If they grew, after backup the space will be marked as available and reused, but the file size will not be reduced. However, if you tried to shrink it and it didn't, then probably the log is still in use. Is anything else that uses the transaction log, which prevents if from truncating? Check the result of this command:

SELECT log_reuse_wait_desc FROM sys.databases where name = N'<database_name>';

It it shows anything other than NOTHING or LOG_BACKUP, you can't shrink it, because something else is using it.