Pages And Extents
Mar 16, 2008
hi 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!
View 3 Replies
ADVERTISEMENT
Jul 24, 2015
I 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 Related
Oct 2, 2014
in microsoft doc there is written on the topic of BP Extensions with SSD's in SQL Server 2014: only clean pages are written to disk... does this mean data pages that have not been modified yet? or also those data pages that have already been modified, and where log has finished writing and the transaction has been marked as commited??
why are there clean data pages being written to L2 cache to make space for other not modified pages? I mean, shoudnt they be modified first, before letting other unmodified data pages into the Cache? I mean they have still to be modified..that makes no sense to me to page them out and page them in again just for other data pages...
View 2 Replies
View Related
Nov 25, 2002
Where should i start to try and fix some unalocated extents?
View 2 Replies
View Related
Jul 29, 2002
Hi 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
View 2 Replies
View Related
Feb 9, 1999
When 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?
View 2 Replies
View Related
Feb 24, 2015
I'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.
View 2 Replies
View Related
Jul 20, 2005
is 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
View 1 Replies
View Related
May 31, 2007
hi,
we have migrated from win 2000 to win 2003. now web site which has database connection with sql server 2000 ( running on same win2003 server ) , is running very slow. pl help as soon as possible.
thanks
archana
View 3 Replies
View Related
Jul 20, 2006
Hi All,
How to estimate the number of pages there should be in the index? Thanks.
View 5 Replies
View Related
Jun 19, 2007
Hello, everyone:
How to calculate or estimate the pages or a table? I always heard someone said their databases have many pages increase one day. What does it mean?
Thanks
ZYT
View 5 Replies
View Related
Mar 15, 2004
people, can anybody tell me some good links,
mssql good links, where are bols,
some months ago i used web page like %mssqlteam%
but now i cant to find this web page,
thanks !
View 2 Replies
View Related
Apr 19, 2007
Hello all,
I have developed a report that when displayed in page layout view is giving me blank pages with only heaer & footer information even though none of my groups have page breaks designated. This also occurs when exported to PDF.
Can anyone provide some information on why this is occurring and how to remedy it ?
Thanks.
View 1 Replies
View Related
Mar 6, 2008
How to reduce Readahead Pages/Sec?
View 2 Replies
View Related
Jun 27, 2006
Hi everyone,
I have a simple question about Rows in Pages for you.
In my opinion, rows are the storage of the data in databases.
I would like to ask that there are any important properties of Rows which I am not aware.
Thanks
View 3 Replies
View Related
Apr 26, 2006
Hi all,
I have a report with a few subreports and after each subreport I've added a page-break. But I want to skip a page and to leave it blank if the previous subreport ends at an odd page, so the next subreport will start at the next odd page instead of the even page.
I use a transparent rectangle to add page breaks after each subreport, but because I don't have access to the Global.PageNumber variable in the body section of the report, I don't know when the page is even, so a second rectangle with a custom expression for the Visibility property is unuseful.
Does anyone know how to fix this issue?
Thank you and I look forward to seeing some suggestions.
Radu.
View 1 Replies
View Related
Apr 1, 2008
when I open report on report service it consist two pages, it's correct
but if I export report to pdf file I get two additional blank pages
it looks like - first correct page with data - blank page with header - second correct page with data -blank page with header
why I get two blank pages with data ?
View 7 Replies
View Related
Dec 27, 2007
I have created several tables in a single layout. How can I put each table in different page?
Thanks
View 3 Replies
View Related
Jan 12, 2007
Hello :
I have a report with several pages, I want poster the same element in all pages, it is what the solution or the property for that?
Thank you very much.
View 2 Replies
View Related
Aug 25, 2006
I have been looking everywhere and cant seem to find out how to do this using 2.0I would like to have my connection strign in my web.config file being decralred publicly in my pages so that I dont have to repeat lines of code throughout pages.In my web.config I have this.<connectionStrings> <add name="myconn" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPNETDB.MDF;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" /> </connectionStrings>then in my pages I haveImports System.DataImports System.Data.SqlClientPublic sqlconnection As New SqlConnection(ConfigurationSettings.AppSettings("myconn"))Public sqlcommand As New SqlCommandPublic sqldataAdapter As New SqlDataAdapterPublic sSQL as StringFunction getdata()sSQL = "INSERT INTO tbl_Idea (Status) value (@Status)Dim dbcommand As New System.Data.SqlClient.SqlCommand(sSQL, sqlconnection)Dim statusparam As New SqlParameter("@Status", SqlDbType.NVarChar)statusparam.Value = "PENDING"dbcommand.Parameters.Add(statusparam)sqlconnection.Open()dbcommand.ExecuteNonQuery()sqlconnection.Close()for some reason this code does not seem to work. It keeps telling me The ConnectionString Property has not been initialized.I do the same thing in my asp.net 1.1 pages using vs 2003. Can some one help or atleast point in the right direction.thanks
View 2 Replies
View Related
Jun 9, 2007
Is there possibility to make backup of MS SQL database directly from ASP.NET pages?
View 2 Replies
View Related
Jun 3, 2008
Hello,
Iam a new developer to asp.net, I have been trying to connect a database to a asp.net page but many times i failed. actually i dont want to connect just directly by dragging and dropping controls rather i wanted to bind controls like textboxes and comboboxes but at first i think i have to make querystrings to and sqlconnection to connect to the database. I mean i have to manually code all these items to get my pages connected. but most of the time i face the bug which is:
Server Error in '/WebSite2' Application.
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
is that because of the fact that i dont sql server management studio installed actually i tried the same process with some other pcs that does not have sql server insatlled but it was working pretty well, but now i dont have a sql server installed and the problem still insists.
hope i have clarified my problem, sorry if it is a bit lenghty
thanks and regards
View 4 Replies
View Related
Dec 11, 2005
I can some on tell why I can or I cannot run a 40000 Pages /day with SQL Express.
Thanks
View 3 Replies
View Related
May 11, 2000
Hello,
Has anyone come up with an easy way to change the code page sort order in the master database. Unfortunately, I inherited two machines running different codes and neither one is ANSI standard. I would like to get them both back to ANSI. Each one contains approximately 15 custom databases.
Any suggestions except prayer would be much appreciated.
Thanks,
View 1 Replies
View Related
Jul 6, 1999
Does anyone know a workaround for the code page translation that occurs if you use bcp to
transfer data in and out of SQL Server. I have a table that I am losing certain characters in the
transfers.
SQL Server 7.0 has the -C code page specifier added to BCP to address this but I am running 6.5 currently.
Any ideas on how to deal with this?
Thanks,
Phil
View 1 Replies
View Related
May 15, 2002
Does anyone have any experience detecting and repairing torn pages? Does Optimization repair Torn Pages ? Any help or resources would be much appriciated.
Late
Matt
View 1 Replies
View Related
Dec 2, 1998
Hello,
I have two identical databases DB1 and DB2. And each have 4 tables
In DB1 i will insert the data in the following order
For Every set of 4 records
Insert into Table1 Values ..
Insert into Table2 Values ..
Insert into Table3 Values ..
Insert into Table4 Values ..
In DB2, i will insert the data as
Insert into Db2..table1 select * from db1..table1
Insert into Db2..table2 select * from db1..table2
Insert into Db2..table3 select * from db1..table3
Insert into Db2..table4 select * from db1..table4
i.e. a bulk copy.
What is hapening is if i run DBCC SHOWCONTIG on both the database tables, it shows avg Space used for DB2 tables as more than 90% but for DB1 it is 4 - 5 %.
And if we check the device stace used by db1, it will be 10 times more by the DB2 for the same set of data. Both databases have different devices to store the log.
1. Can we have any command/procedure to reasllocate all the data so that minimum pages are used to store the data.
2. One more thing, is there any diff in SQL server 6.5 installed on Dell6100 ( Pentium Microprocessor ) and winNT 4.0 ? Because what is hapening is, if the log space is full, and if we Stop and start the SQL server on Dell system, it is not at all clearing the log space occupied. But in NT it is clearing the LOG.
3. Does any SQL server service Packs affect this..? If any let me know
4. If we create saperate LOG devices, what othere information is stored in the Data devices othere that data. Because in my case, DB1 is occupying more space than the actual data inserted.
ThanX
__Vijay VM
View 1 Replies
View Related
Jul 20, 2005
I am trying to understand how the data in sql server is stored andalso regarding fill factor and page splitting.1) My first question what is the difference between Index pages andData pages.and how are they different for clustered and non clustered indexes andheap tables.2) What is the relation between index and data pages.2) BOL says that fill factor is used to define the amount of freespace on each page of index. I am confused here what does index pagesand data pages containfor clustered/non clustered/heap tables.3) Why does page splits occur and do they occur due to the lack ofspace in index or data pages?Thanksskura
View 2 Replies
View Related
Apr 11, 2008
Hello everybody
I've built a few reports using Reporting Services. The number of pages in my reports isdifferent in the on-screen rendered report from the printed version.
My report properties are set to an A4 page (210 x 297) and also Globals.Page give me a different result. (on the screen I see 2 pages and I print 6 pages).
How can I solve this problem?
Best regards
View 5 Replies
View Related
Mar 20, 2008
Hi,
I've created a simple .rdl report and seems to show the preview under my visual studio. But, when I add the .rdl file into the server and export them to be a .PDF, The pdf is created with two blank pages for every single page with data.
Please comment me to fix this.
Thanks.
View 5 Replies
View Related
Nov 1, 2006
Hi all,
Could you tell the correct way to use Reporting Services on ASP.NET pages?
Now I wanna create an ASP.NET page to show some reports, and I hope to control all logic by program, so I need know the API between ASP.NET and Reporting Services.
For example, I wanna pass some data to Reporting Services via API, and then Reporting Services handle the data and return reports to me, and then I can show the reports on my web pages.
Please tell me how?
View 5 Replies
View Related
Jul 9, 2007
Is it possible to say for example have the first page that contains a chart in portrait layout and the rest of the report that is a table in landscape layout?
View 3 Replies
View Related
Oct 12, 2007
Hi,
can anyone tell me, how does Reporting Services work in the following scenario:
There is a report with multiple pages (eg. 50 pages). The user runs the report.
Question: What is transferred from the Reporting Services server to the client desktop ? all pages or just the first one ?
Background> I don't want to let the user wait until all pages are received (because he may be interested only in the first one and the jump to the last one and that is all he wants to see)
Any ideas are appreciated.
View 1 Replies
View Related
