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autogrowth


autogrowth

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sqlfriends
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I would like to know as a dba practice, do you setup the autogrow for file size to a restricted file growth or unrestricted file growth.


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Evil Kraig F
Evil Kraig F
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Personally, unrestricted with warnings that watch the drive(s) itself for space issues.


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Richard Fryar
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If you have the ability to receive alerts when disk space is getting low, then unrestricted growth makes sense.
On the other hand, you don't want one out-of-control database to create problems for other databases on a shared server, so for some environments it makes sense to set a restricted size and monitor file usage carefully.

Personally I receive alerts when a filegroup is getting full, and also when an autogrowth has occurred, so I get plenty of advance warning of potential space problems.


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MyDoggieJessie
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Reasoning for wanted to limit frequent file growth is because of the contention created by having to grow the data/log files on the disk(s). It's often best to choose an appropriate size in advance to minimize this growth, if the file does have to grown, consider choosing a large enough size in MB's so that it won't have to do it again.

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prettsons
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I found this interesting KB article Considerations for the "autogrow" and "autoshrink" settings in SQL Server..

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Grant Fritchey
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Personally, unrestricted with lots and lots and lots of monitoring and alerts in place so that I can try to prevent the disks from filling up. Either approach has downsides. If you restrict the growth, you avoid filling the drive, but, you put a database into read only mode. Depending on the database in your system, that could be a resume generating event.

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sqlfriends
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Thanks, currently we do have own DiskspaceCheck sql job to monitor the disk space.
So we set it to unrestricted.
But I see some people are using restricted method.
I am curious if it is set to restricted size and if it is full, what will happen, does it generate any errors or an alert and notifiy DBA, how is this alert set up?

You said the database will become to readonly, is it automatically change it readonly mode?

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Grant Fritchey
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Yes & no. It just stops allowing writes. You get errors. Reads work fine. All writes stop because there's nowhere for them to go.

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sqlfriends
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So, it doesnot send any kind of alerts to DBA proactively?
Grant Fritchey
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I wasn't aware that SQL Server on it's own EVER sent anything to the DBA proactively. All monitoring has to be built or bought.

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The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood...
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Author of: SQL Server Query Performance Tuning and SQL Server Execution Plans
Product Evangelist for Red Gate Software
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