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  1. PO
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    <p>It appears that it's on by default - although check any shortcut you are using to launch and make sure it's not launching with a <code>-x</code></p> <p>From <a href="http://msdn.microsoft.com/en-us/library/ms345524(v=SQL.90).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/ms345524(v=SQL.90).aspx</a></p> <blockquote> <p>This feature can only be disabled if an instance of SQL Server is started by using the -x argument with the sqlservr command-prompt utility.</p> </blockquote> <p>Also you'll want to know that the table is populated as queries are run if SQL Server uses the query optimizer - this table is <strong>cleared when you restart SQL Server</strong>.</p> <p>From <a href="http://msdn.microsoft.com/en-us/library/ms345434(v=SQL.90).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/ms345434(v=SQL.90).aspx</a></p> <blockquote> <p>Information returned by sys.dm_db_missing_index_details is updated when a query is optimized by the query optimizer, and is not persisted. Missing index information is kept only until SQL Server is restarted. Database administrators should periodically make backup copies of the missing index information if they want to keep it after server recycling.</p> </blockquote> <p>Lastly there is an article that goes into the limitations here that you may or may not know about, but I'll post in case someone else happens across this post and needs: <a href="http://msdn.microsoft.com/en-us/library/ms345485(v=SQL.90).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/ms345485(v=SQL.90).aspx</a></p> <p>I didn't see anything about the feature being missing in some versions but you WILL need certain permissions: </p> <blockquote> <p>Users must be granted the VIEW SERVER STATE permission or any permission that implies the VIEW SERVER STATE permission to query this dynamic management view.</p> </blockquote>
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    1. POsys.dm_db_missing_index_details returns no rows
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    1. USDKnight
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      1. VTUpMod
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    1. COHi DKnight. Awesome answer - VERY thorough. Unfortunately it doesn't look like my SQL server is being started with -x. Also I have tried looking at the query as 'sa' and still see nothing so I suspect it is not a permission issue in this case. Any suggestions of what else I can check? Happy to post the result of the system queries if more information is needed.
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    2. COThe only other thing that I saw suggested was to make sure that you are running a query that actually needs to be optimized. The way to check is to run a 'Display Estimated Execution Plan' and verify that you have "Missing Index (Impact...." in green. Not sure if that is good enough to generate the table entry, but running that query should put something in that table
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    3. COAlso if you are connected to multiple DB servers verify that you are checking the correct one - i could see myself making that error
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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