Comments on: SQL SERVER – Enable Automatic Statistic Update on Database

By: Guinn Unger

Guinn Unger — Tue, 18 Dec 2012 15:14:29 +0000

We have also found it necessary to run statistics after inserting rows which have data which was not previously in the table index. For example, if you copy a large number of rows from one year to the next. The optimizer apparently has no clue that those values exist. Updating the statistics can have an incredible effect on speed.

By: Pavan Mishra

Pavan Mishra — Thu, 27 Sep 2012 04:02:22 +0000

To check the autostatistics on or off try this…

SELECT DATABASEPROPERTYEX(‘database name’,'IsAutoUpdateStatistics’)

By: Gaius Gracchus

Gaius Gracchus — Thu, 05 Jul 2012 20:35:10 +0000

The automatic statistics update uses a sampling rate that is way too small, and you cannot override this sampling rate. On a large table the sampling rate is often well less than 1%. This in turn causes the query optimizer to make bad decisions – and you only need a few such bad decisions to cripple database performance. I’ve spoken to Microsoft about this and they refuse to acknowledge there’s a problem; so the only solution is to run statistics manually with FULLSCAN,NORECOMPUTE on a regular basis. We’ve found every 2 weeks is fine.

By: stuartweb

stuartweb — Tue, 17 Apr 2012 12:15:51 +0000

Hi Pinal,

I really impressive to your information but I want to ask one thing that how can to check Automatic Statistic Update is already enabled or not… Please suggest to us about that.

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By: Amel Music

Amel Music — Thu, 15 Oct 2009 20:52:32 +0000

Hi Pinal,
when statistic updates are performed? after every insert/update.. or when server has some free resources?

By: Ramdas

Ramdas — Thu, 15 Oct 2009 14:40:08 +0000

Hi Pinal,
Is it always a good idea to have the Auto update statistics turned on. Are there instances where it needs to be turned off.

By: deep

deep — Thu, 15 Oct 2009 09:25:07 +0000

Hello Pinal,

Is there a possibility of high resources utilization during the execution of the above processes? If yes, is it only executed during the schedule maintenance period?

By: paul

paul — Thu, 15 Oct 2009 08:11:11 +0000

Hi Pinal,

how to export & import statistics from production server to development server?

thanks in advance

By: aasim abdullah

aasim abdullah — Thu, 15 Oct 2009 06:18:04 +0000

SELECT is_auto_create_stats_on,is_auto_update_stats_on
FROM sys.databases
WHERE name = ‘YOUR DATABASE NAME HERE’

By: Chintan Shah

Chintan Shah — Thu, 15 Oct 2009 04:47:39 +0000

Hi,

How can I check that whether Automatic Statistic Update is already enabled or not?

Is it Enabled by-default?