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 Transaction log not truncating when backing up

Author  Topic 

masterdineen
Aged Yak Warrior

550 Posts

Posted - 2013-01-07 : 11:32:26
Hello there.

I am trying to backup a transaction log that is about 2 gig in size but only a couple of MBs are being truncated.

what could be causing the log not to truncate.

nigelrivett
Master Smack Fu Yak Hacker

3385 Posts

Posted - 2013-01-07 : 11:46:38
What do you mean by truncated?
Are you expecting the log backup to shrink the log?
All a backup does is release log space to be reused.

==========================================
Cursors are useful if you don't know sql.
SSIS can be used in a similar way.
Beer is not cold and it isn't fizzy.
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masterdineen
Aged Yak Warrior

550 Posts

Posted - 2013-01-07 : 11:56:48
that's it. when I back the log that is 2 gig. it doesn't release any space

the log file still shows 2 gig
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sodeep
Master Smack Fu Yak Hacker

7174 Posts

Posted - 2013-01-07 : 13:55:58
Check log_reuse_wait and log_reuse_wait_desc in sys.databases. It will tell why it didn't.
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masterdineen
Aged Yak Warrior

550 Posts

Posted - 2013-01-08 : 03:48:17
when i select * from sys.databases i get the following message

An error occurred while executing batch. Error message is: The directory name is invalid.
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masterdineen
Aged Yak Warrior

550 Posts

Posted - 2013-01-08 : 03:56:52
this is due to low disk space
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nigelrivett
Master Smack Fu Yak Hacker

3385 Posts

Posted - 2013-01-08 : 04:01:49
Is that 2GB in size or 2GB used? Is there free space in the log - if not it will grow in size, if there is free space it will be used and is not a problem - you can reduce the size by a shrink.



==========================================
Cursors are useful if you don't know sql.
SSIS can be used in a similar way.
Beer is not cold and it isn't fizzy.
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masterdineen
Aged Yak Warrior

550 Posts

Posted - 2013-01-08 : 04:04:06
i thought shrinking was meant to be avoided?
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masterdineen
Aged Yak Warrior

550 Posts

Posted - 2013-01-08 : 04:08:29
thank you i have done that and i have just freed up 2 gig.

why does that happen. why dont the unallocated space become released when the log is backed up
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