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Log size is Big


Log size is Big

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Old Hand
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i am new in DBA.
If in a database MDF file Size is 10 GB and LDF file size is 50 GB

What are the steps require to reduce to log file size.
Bhuvnesh
Bhuvnesh
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If in a database MDF file Size is 10 GB and LDF file size is 50 GB.What are the steps require to reduce to log file size.
LDF will grow it should. it is its nature. but we need to manage the files ? whats the recovery model ? simple or full ? are you taking its regular backup ? see this link http://www.sqlservercentral.com/articles/Administration/64582/

-------Bhuvnesh----------
I work only to learn Sql Server...though my company pays me for getting their stuff done;-)
anthony.green
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As you state that you are a new DBA, I would strongly recommend reading the Accidental DBA guide (link in my signature below) as it will cover some of the main issues which are faced in the world of SQL.

But as Bhuvnesh, what is the recovery model of the database? If FULL or BULKLOGGED do you have transaction log backups running?



How to post data/code for the best help - Jeff Moden
Need a string splitter, try this - Jeff Moden
How to post performance problems - Gail Shaw
Managing Transaction Logs - Gail Shaw
Troubleshooting SQL Server: A Guide for the Accidental DBA - Jonathan Kehayias and Ted Krueger


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Old Hand
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recovery model is full
anthony.green
anthony.green
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Do you do transaction log backups?

Do you need the databases to be in full recovery?

What is your acceptable amount of data loss? What is your recovery point objective? Can you loose a days worth of data with no affects to the business, or can you only loose minutes?

How often do you do full or differential backups?



How to post data/code for the best help - Jeff Moden
Need a string splitter, try this - Jeff Moden
How to post performance problems - Gail Shaw
Managing Transaction Logs - Gail Shaw
Troubleshooting SQL Server: A Guide for the Accidental DBA - Jonathan Kehayias and Ted Krueger


GilaMonster
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Please read through this - Managing Transaction Logs

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


Aadhar Joshi
Aadhar Joshi
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You should keep it to simple recovery model, untill u dont think your all transactions should logged in log file till the database backup process and it increses size of your log file..
OR you should take backup periodically..
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Old Hand
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Well i have gone through the articles mentioned above. Currently there is no transaction back up. database is in full recovery.

Will it be useful if we run the below query when there is no transaction active?

USE DBNAME;
GO
-- Truncate the log by changing the database recovery model to SIMPLE.
ALTER DATABASE DBNAME
SET RECOVERY SIMPLE;
GO
-- Shrink the truncated log file to 1 MB.
DBCC SHRINKFILE (DBNAME_Log, 1);
GO
-- Reset the database recovery model.
ALTER DATABASE DBNAME
SET RECOVERY FULL;
GO
anthony.green
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Do you need the database to be in FULL recovery?

As I have said what is your acceptable amount of data loss? How much data can you afford to loose with this database?



How to post data/code for the best help - Jeff Moden
Need a string splitter, try this - Jeff Moden
How to post performance problems - Gail Shaw
Managing Transaction Logs - Gail Shaw
Troubleshooting SQL Server: A Guide for the Accidental DBA - Jonathan Kehayias and Ted Krueger


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Old Hand
Old Hand (329 reputation)Old Hand (329 reputation)Old Hand (329 reputation)Old Hand (329 reputation)Old Hand (329 reputation)Old Hand (329 reputation)Old Hand (329 reputation)Old Hand (329 reputation)

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database to be Full recovery.
there will be no data loss or minimum data loss.
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