autogrowth

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autogrowth

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sqlfriends

Posted Wednesday, November 28, 2012 12:09 PM

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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.

Thanks

Post #1390047

Evil Kraig F

Posted Wednesday, November 28, 2012 12:17 PM

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

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Post #1390053

Richard Fryar

Posted Wednesday, November 28, 2012 12:24 PM

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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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Post #1390058

MyDoggieJessie

Posted Wednesday, November 28, 2012 8:13 PM

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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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Post #1390237

prettsons

Posted Wednesday, November 28, 2012 9:22 PM

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

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Post #1390265

Grant Fritchey

Posted Thursday, November 29, 2012 5:46 AM

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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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Post #1390466

sqlfriends

Posted Thursday, November 29, 2012 9:51 AM

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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?

Thanks

Post #1390687

Grant Fritchey

Posted Thursday, November 29, 2012 10:02 AM

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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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Post #1390700

sqlfriends

Posted Thursday, November 29, 2012 10:46 AM

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So, it doesnot send any kind of alerts to DBA proactively?

Post #1390724

Grant Fritchey

Posted Thursday, November 29, 2012 10:50 AM

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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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Post #1390726

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