Unalocated Extents
Nov 25, 2002Where should i start to try and fix some unalocated extents?
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Pages And Extents
Mar 16, 2008hi all!
i'm not sure that i understand how sql server stores data.
in documentation, i found that sql server stores data in pages.
every page have size of 8192 bytes (8060).
as i understand well, every table row is stored in one page. also, every table row can not be larger then one page. and that's where my confusion starts - because it sounds like we can not have data in table that is larger then 8060.
please, if you can you help me to understand this.
thank you in advance!
Reducing Number Of Extents
Jul 29, 2002Hi all,
I have started to look at the way our production DB has been defined and set up, with the view to improving performance.
The DB is now 11gb, and the original size was set up as 3000mb, the rest has been take in 10% additional extents.
Now, back in my DB2 DBA days, this was a bad thing to have any data spread across extents as they may not be contiguous. I am assuming that is the same with SQL Server. Can someone confirm/deny this?
If this is the case, how can I get the DB back into one primary partition?
Thanks in advance.
Mike
Identifying Page Numbers Associated With Extents
Feb 9, 1999When running the DBCC newalloc command I get some errors like the following:
"extent 51400 is in the wrong segment"
"chain processed with bad segment for object 448004627"
I've checked the system tables and system stored procedures and see no reference to page numbers being mapped to segments or identifying which extents are associated to which tables. I'm trying to determine which pages are associated with these extents so that I can print them to view the content. Any ideas how to determine the page numbers associated with extents and which extents are associated with each table?
DB Engine :: Why Does Server Group Pages Into Extents
Jul 24, 2015I am reading the official documentation on pages and extents. I've also read an article on the official SQL Server Blog (sadly, I can't link as a new member). These articles do a good job explaining what an extent is.Why use extents at all?I can't find a good example anywhere of how grouping pages into extents make SQL Server work more efficiently. Any good example of what SQL Server would be missing if it didn't have extents at all, and how extents fix this?
View 6 Replies View RelatedScript Which Checks When Running Out Of Auto-growth Extents?
Feb 24, 2015I'm looking for hints/tips/url for a script which can be run a few times per day and either sends an email or alert for the following condition:
Script would function like:
[URL]
Databases - Dynamic Log File Growths Remaining Alarm
Dynamic Log File Growths Remaining alarm becomes active when a non fixed size log file in any database is in danger of running out of space to grow. It is raised when a log file is almost full and the file cannot automatically grow enough to relieve the problem.
We have our databases with Enable Autogrowth (in Megabytes), and then a Maximum File Size (Limited to a MB value).
Example: If one of the database logs (or possibly filegroup primary) picks up another extent and is about 5 extents (arbitrary value) away from running out of growth room, an alert would be sent to an email address/profile.
P.S. Yes, there are multiple databases on this one instance and the script should loop to run through all of them.
Can You, By Default, Allocate Uniform Extents Upon Creation Of Index/table?
Jul 20, 2005is there a setting that will ebnable uniform extent allocation uponcreation of index/table by default ?if there isn't any default setting can you code it in?thanks,Doron
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