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Backup Sqlserver 2008


I have my log file size of 800 mb and i did a backup. The Backup is fine but my log file still the same size. because I thought after the backup, the log file size would be less.

Am i correct ?

Many Thanks
Microsoft SQL Server

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8/22/2022 - Mon
Metehan Ozcullu

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Tks, I did the backup 3 times and shrink.

Now file size is 15 mb. :)

Guy Hengel [angelIII / a3]

no, not correct.

the LOG BACKUP will NOT decrease the log file size .... just mark the space used internally as reusable.
the FULL BACKUP will not act on the log file at all in that regards.

note: you should, in regular operations, NOT try to regularly reduce the log file, as that will just require the db to increment the file size again ...
instead, make sure you just run LOG backups regularly enough.


You mean that if I do regular log backup. The file is not going to grow because he is going to use the reusable area ?

Tks angelll.
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Metehan Ozcullu

yes it will use the emptied log area. to get that area back to os you should shrink the file.


Thank you very much  mozcullu and angelIII