Updated Statistics For DBCC SHOWCONTIG?
Apr 22, 2004
I ran an INDEXDEFRAG against the tables in my DB, & yet the results in DBCC SHOWCONTIG are the same before and after for some of the tables that it defragmented. Why?
In the DBCC SHOWCONTIG before defragging, this was a sample table:
Table1:
- Pages Scanned................................: 2279
- Extents Scanned..............................: 294
- Extent Switches..............................: 293
- Avg. Pages per Extent........................: 7.8
- Scan Density [Best Count:Actual Count].......: 96.94% [285:294]
- Extent Scan Fragmentation ...................: 4.42%
- Avg. Bytes Free per Page.....................: 358.9
- Avg. Page Density (full).....................: 95.57%
I ran the script from the BOL entry for 'DBCC SHOWCONTIG' to defragment all indexes in a database , under letter E, with @maxfrag = 5%. It returned the following results (there are 5 nonclustered indexes):
Executing DBCC INDEXDEFRAG (0, table1,
3) - fragmentation currently 13%
Pages Scanned Pages Moved Pages Removed
------------- ----------- -------------
1146 1088 0
(1 row(s) affected)
(1 row(s) affected)
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
Executing DBCC INDEXDEFRAG (0, table1,
4) - fragmentation currently 13%
Pages Scanned Pages Moved Pages Removed
------------- ----------- -------------
509 509 0
(1 row(s) affected)
(1 row(s) affected)
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
Executing DBCC INDEXDEFRAG (0, table1,
5) - fragmentation currently 13%
Pages Scanned Pages Moved Pages Removed
------------- ----------- -------------
509 509 0
(1 row(s) affected)
(1 row(s) affected)
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
Executing DBCC INDEXDEFRAG (0, table1,
6) - fragmentation currently 13%
Pages Scanned Pages Moved Pages Removed
------------- ----------- -------------
720 685 0
Running DBCC SHOWCONTIG again, the results were exactly the same for Table1.
Thanks for any advice to interpret this information.
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May 7, 2002
I was attempting to run the dbcc command on a couple of my databases and I get some errors on some servers but not others. Is there a reason for this?
What am I doing wrong? Is there a server setting that stops dbcc commands?
Here are the commands and errors
dbcc showcontig
Server: Msg 2583, Level 16, State 3, Line 1
An incorrect number of parameters was given to the DBCC statement.
dbcc showcontig (PS_ABS_HIST_COM_UK)
Server: Msg 2560, Level 16, State 14, Line 1
Parameter 1 is incorrect for this DBCC statement.
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May 8, 2002
Hi
Here us the Output of DBCC SHOWCONTIG for one of my tables
Row Size = 82 (i.e Sum of the lengths of all the Columns)
No: of Rows = 162 (No of Rows in the table)
162 Rows can fit in two pages, Is there any way to make sure that these pages go on a same Extent so that my Scan Density will be 100.00% ( Ratio of Extent Switches to the Extent Scanned)
I tried all the Combinations of rebuilding the Clustered Indexes,BCP out the data and BCP IN, But all in vain....It does not put the pages in a same extent.
Any Help in this regard is greatly appreciated!!
DBCC SHOWCONTIG scanning 'VENU_TEMP1' table...
Table: 'VENU_TEMP1' (1681441064); index ID: 1, database ID: 18
TABLE level scan performed.
- Pages Scanned................................: 2
- Extents Scanned..............................: 2
- Extent Switches..............................: 1
- Avg. Pages per Extent........................: 1.0
- Scan Density [Best Count:Actual Count].......: 50.00% [1:2]
- Logical Scan Fragmentation ..................: 0.00%
- Extent Scan Fragmentation ...................: 50.00%
- Avg. Bytes Free per Page.....................: 58.0
- Avg. Page Density (full).....................: 99.28%
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
Thanks In Advance
Venu
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May 11, 2001
Whenever I try to run this command against a table, I get the following error message:
Parameter 1 is incorrect for this DBCC statement.
Any ideas?
Thanks
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May 17, 2001
Results are -
- Pages Scanned................................: 21767
- Extents Scanned..............................: 2738
- Extent Switches..............................: 19919
- Avg. Pages per Extent........................: 7.9
- Scan Density [Best Count:Actual Count].......: 13.66% [2721:19920]
- Logical Scan Fragmentation ..................: 91.57%
- Extent Scan Fragmentation ...................: 29.69%
- Avg. Bytes Free per Page.....................: 4409.4
- Avg. Page Density (full).....................: 45.52%
is this good/bad. How do I interpret these results ?
Could someone drop some lines.
Thanks a lot.
Rick
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Jul 17, 2001
Does anyone know of a way to capture the results of DBCC ShowContig. My intentions are to capture these results, particularly the Avg. Page Density value and build my Reindexing jobs based on those values. Any ideas would be appreciated.
Thanks
Joe
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Feb 18, 2001
Dear sir
I understand the term fragmentation.Will u please giude me regarding what is meant by internal fragmentation and external fragmentation their difference and given an output of DBCC SHOWCONTIG how do we determine wheather the there is interfragmentation or external fragmentation
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Mar 10, 2005
Hi,
Ive just created a table, clustered index with fillfactor 70% (as it will be doing thousands of inserts and deletions daily).
After a few thousand inserts, i run dbcc showcontig on the table.
Result:
---------
Table: 'MyTable' (1650104919); index ID: 1, database ID: 10
TABLE level scan performed.
- Pages Scanned................................: 5460
- Extents Scanned..............................: 686
- Extent Switches..............................: 1885
- Avg. Pages per Extent........................: 8.0
- Scan Density [Best Count:Actual Count].......: 36.21% [683:1886]
- Logical Scan Fragmentation ..................: 13.19%
- Extent Scan Fragmentation ...................: 0.29%
- Avg. Bytes Free per Page.....................: 2083.2
- Avg. Page Density (full).....................: 74.26%
***the Extent switches just balloons out, and scan density drops badly. is this terrible?
Also - What is the main difference between "Logical Scan Fragmentation" & "Extent Scan Fragmentation". Every time, its either one of these values is much higher than the other. What is the best practice, which of the 2 should I be trying to keep fragmentation low?
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Apr 7, 1999
Can anybody tell me what the "Disconnected Overflow Pages" means in the
DBCC SHOWCONTIG output.
Thanks
Kevin Napier
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Oct 17, 2004
DBCC SHOWCONTIG scanning 'MYTAB' table...
Table: 'MYTAB'(50099219); index ID: 1, database ID: 7
TABLE level scan performed.
- Pages Scanned................................: 150
- Extents Scanned..............................: 25
- Extent Switches..............................: 25
- Avg. Pages per Extent........................: 6.0
- Scan Density [Best Count:Actual Count].......: 73.08% [19:26]
- Logical Scan Fragmentation ..................: 1.33%
- Extent Scan Fragmentation ...................: 96.00%
- Avg. Bytes Free per Page.....................: 878.5
- Avg. Page Density (full).....................: 89.15%
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
Since Extents Scanned and Extent Switches r equal, why the density is slow, what about pages per Extent, can it be manaully increased?
Howdy
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Apr 18, 2006
Hi
The following is the result of the DBCC Showcontig
DBCC SHOWCONTIG scanning 'publishers' table...
Table: 'publishers' (2057058364); index ID: 1, database ID: 5
TABLE level scan performed.
- Pages Scanned................................: 1
- Extents Scanned..............................: 1
- Extent Switches..............................: 0
- Avg. Pages per Extent........................: 1.0
- Scan Density [Best Count:Actual Count].......: 100.00% [1:1]
- Logical Scan Fragmentation ..................: 100.00%
- Extent Scan Fragmentation ...................: 0.00%
- Avg. Bytes Free per Page.....................: 7699.0
- Avg. Page Density (full).....................: 4.88%
Now as a per a Doc i read the
Scan Density should be 100%
Logical Scan Fragmentation should be from 0-10%
Extent Scan Fragmentation should be 0%
Here Logical Scan Fragmentation ..................: 100.00%
So I ran the DBCC INDEXDEFRAG command
Still its showing the same results, can someone explain , should it not become 0-10%
I even tried the DBCC DBREINDEX
No Effects Please Advice.
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Oct 30, 2007
I feel I have a REAL question this time
I have been trying to up my sql knowledge and have been reading the following; http://www.sql-server-performance.com/articles/dba/dt_dbcc_showcontig_p1.aspx]
Now I think I understand it fully but I have a question about this. I understand Scan density, logical and extent scan fragmentation and I also now understand page density. My question. How do you know depending on your scenario how much to leave in your pages? Would you reindex heavily read tables to be of high scan density with low logical and extent fragmentation and aim for as much page density as possible? Well what if you have a heavily read table that also has a lot of inserts on it daily. What percentage of page density would you tell dbcc reindex to leave in your pages in order to avoid page splits? Or rather, would you allow them to occur and just have dbcc reindex run often? As im migrating from sql 2000 this is the first sql 2005 function I have started to look at and I already have so many questions...
"Impossible is Nothing"
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Aug 21, 2001
Hello,
I'm new to SQL Server, can somebody please give me a good explaination about whats wrong in the following table stats. I tried to see it in BOL, but I wuold appreciate if someone can suggest me the rules here, for expample what should be the ideal scan density and so on. Also let me know what one should do if there are some problems like mentioned below:
Thanks in advance.
Zubair
DBCC SHOWCONTIG scanning 'OrderDetails' table...
Table: 'OrderDetails' (2141354793); index ID: 1, database ID: 7
TABLE level scan performed.
- Pages Scanned................................: 24168
- Extents Scanned..............................: 3034
- Extent Switches..............................: 4984
- Avg. Pages per Extent........................: 8.0
- Scan Density [Best Count:Actual Count].......: 60.60% [3021:4985]
- Logical Scan Fragmentation ..................: 65.76%
- Extent Scan Fragmentation ...................: 2.80%
- Avg. Bytes Free per Page.....................: 775.8
- Avg. Page Density (full).....................: 90.42%
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
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Jul 14, 2004
DBCC SHOWCONTIG WITH TABLERESULTS will show a ROW column for an index's row count. However, on an important table with quite a few indexes that I am using as a baseline, ROW is NULL for all indexes. Why? BOL definines ROWS as:-
"Number of data or index records at that level of the index. For a heap, this is the number of data records in the entire heap."
By the way, if I select from sysindexes for a one of the above indexes, there is a correct rowcount for the index.
Any ideas?
Clive
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Nov 3, 2005
hi,
I am running this :
dbcc showcontig (EMPLOYEE_EXTRACT)
i got error below:
Server: Msg 2501, Level 16, State 45, Line 1
Could not find a table or object named 'EMPLOYEE_EXTRACT'. Check sysobjects.
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
Then i look for that table name in sysobjects table it return me a record with that name
select [name] from sysobjects where [name] ='EMPLOYEE_EXTRACT'
what is the problem here? - Any idea would be greatly appreciated.
I run dbcc showcontig on other table , it runs fine.
Thanks
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Nov 15, 2007
Dear Experts,
just now i've read a great article from sql server performance.com
and understand several key factors related to performance.
still i have one doubt that what will be the best ratio between
extents scanned and extent switches.
here i'm pasting some of my table result. please suggest me how is the performance of the table
table 1
- Pages Scanned................................: 85618
- Extents Scanned..............................: 11283
- Extent Switches..............................: 85405
- Avg. Pages per Extent........................: 7.6
- Scan Density [Best Count:Actual Count].......: 12.53% [10703:85406]
- Logical Scan Fragmentation ..................: 49.93%
- Extent Scan Fragmentation ...................: 46.31%
- Avg. Bytes Free per Page.....................: 2707.1
- Avg. Page Density (full).....................: 66.55%
table2
- Pages Scanned................................: 60648
- Extents Scanned..............................: 7650
- Extent Switches..............................: 60639
- Avg. Pages per Extent........................: 7.9
- Scan Density [Best Count:Actual Count].......: 12.50% [7581:60640]
- Logical Scan Fragmentation ..................: 50.93%
- Extent Scan Fragmentation ...................: 64.01%
- Avg. Bytes Free per Page.....................: 2672.5
- Avg. Page Density (full).....................: 66.98%
thankyou very much
Vinod
Even you learn 1%, Learn it with 100% confidence.
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Jul 23, 2005
I have a table where I store around 1 million rows for 7 days.I run a DBCC SHOWCONTIG every week and I noticed that the number ofRows and the Average Free Bytes are stable but the number of Extentsand the Average Record Size keeps increasing.Any idea how to explain this incrase? and how to stop it? Will DBCCDBREINDEX will help?Here is my data:Rows: 1166273 (same as last week)Extents: 147099 (+10% since last week)Max RecordSize: 7050Average Record Size: 7688 (+10% since last week)AverageFreeBytes: 372Average Page Density: 95Scan density: 30
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Dec 5, 2000
I ran a DBCC Showcontig (tableid) and it tell me that one of my tables is only putting 0.19% data on each page. How can I control this for more data on a page. It tells me that I have 8078.8 bytes free per page.
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May 21, 2008
Dear All,
i've used the DBCC showcontig command against my table table103
but i dont know how to analyze the results of fragmentation levels. please give me some explanations or some good links.....
the results are:
DBCC SHOWCONTIG scanning 'TABLE103' table...
Table: 'TABLE103' (1899257921); index ID: 1, database ID: 10
TABLE level scan performed.
- Pages Scanned................................: 20
- Extents Scanned..............................: 13
- Extent Switches..............................: 18
- Avg. Pages per Extent........................: 1.5
- Scan Density [Best Count:Actual Count].......: 15.79% [3:19]
- Logical Scan Fragmentation ..................: 90.00%
- Extent Scan Fragmentation ...................: 92.31%
- Avg. Bytes Free per Page.....................: 3281.4
- Avg. Page Density (full).....................: 59.46%
Vinod
Even you learn 1%, Learn it with 100% confidence.
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Jan 8, 2007
Hi friends,
please guide me as to why will we use these 2 commands.
their basic use and what information do we have to check from the results of these commands. and what changes do we have to make?
how can we improve performance by using these commands?
please also tell me if these commands are to be used in conjunction with other commands.
Regards,
Jheds
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Jul 20, 2005
Can someone please help me interpret this result set below and suggeston way I can speed up my table? What changes should I make?DBCC SHOWCONTIG scanning 'tblListing' table...Table: 'tblListing' (1092914965); index ID: 1, database ID: 13TABLE level scan performed.- Pages Scanned................................: 97044- Extents Scanned..............................: 12177- Extent Switches..............................: 13452- Avg. Pages per Extent........................: 8.0- Scan Density [Best Count:Actual Count].......: 90.17% [12131:13453]- Logical Scan Fragmentation ..................: 0.86%- Extent Scan Fragmentation ...................: 2.68%- Avg. Bytes Free per Page.....................: 1415.8- Avg. Page Density (full).....................: 82.51%DBCC execution completed. If DBCC printed error messages, contact yoursystem administrator.Thank you.
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Feb 19, 2008
Hi:
how could I load "DBCC showcontig (@TableName) with tableResults" to a table?
I created a table and let insert to it via above "DBCC...."
but problem is the results with "DBCC execution completed. If DBCC printed error messages, contact your system administrator.", or how could I mute this output line for each table ?
thanks
David
--=========================================
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
ObjectName ObjectId IndexName IndexId Level Pages Rows MinimumRecordSize MaximumRecordSize AverageRecordSize ForwardedRecords Extents ExtentSwitches AverageFreeBytes AveragePageDensity ScanDensity BestCount ActualCount LogicalFragmentation ExtentFragmentation
-------------------------------------------------------------------------------------------------------------------------------- ----------- -------------------------------------------------------------------------------------------------------------------------------- ----------- ----------- -------------------- -------------------- ----------------- ----------------- ---------------------- -------------------- -------------------- -------------------- ---------------------- ---------------------- ---------------------- -------------------- -------------------- ---------------------- ----------------------
sysproxylogin 37575172 clust 1 0 0 0 0 0 0 0 0 0 0 0 100 0 0 0 0
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Jul 31, 2006
Hi
My understanding is that whenever any INSERT, DELETE, or UPDATE statements execute that impacts significant amount of rows in a table, its statistics must be automatically updated by SQL Server. But it was surprise to see in the profiler that after INSERT no update statistics event happen. But the moment a SELECT is executed on the table the event 'Auto Stats' is shown up. What is the reason behind this? Why the Auto Stats not happening immediately after the INSERT statement?
Following code can be used to illustrate this (in the profiler select the Auto Stats event under Performance):
IF(SELECT OBJECT_ID('t1')) IS NOT NULL
DROP TABLE t1
GO
CREATE TABLE t1(c1 INT, c2 INT IDENTITY)
INSERT INTO t1 (c1) VALUES(1)
INSERT INTO t1 (c1) VALUES(2)
INSERT INTO t1 (c1) VALUES(3)
CREATE NONCLUSTERED INDEX i1 ON t1(c1)
GO
--Now add 10,000 rows to update so that statistics are updated. Look into the profiler:
SET NOCOUNT ON
GO
DECLARE @n INT
SET @n = 1
WHILE @n <= 10000
BEGIN
INSERT INTO t1 (c1) VALUES(2)
SET @n = @n + 1
END
SET NOCOUNT OFF
GO
--Next runt he following statement. The profiler will now show 'Auto Stats' event
SELECT * FROM t1 WHERE c1 = 2
Regards
Sanjay Singh
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Dec 23, 2014
I'm working on databases where statistics of some indexes (tables) are changing too frequently. Once I update them manually, one minute after they get 10-20% change, and five minutes after they get over 100% change. Tables get updated very frequently (multiple times in a second).
When I run a query to read from sys.stats, sys.dm_db_stats_properties and other dynamic views, I see that they were last updated when I did it manually, but the change rate overpassed the 500+20% (tables have multiples of 10K rows). Auto create and update statistics are set to true on all databases, and I don't know why sql server does not do that automatically.
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Feb 1, 2004
Hi all,
Is it neccessay to run the "Update Statistics" after run "DBCC DBReindex"? Does "Update Statistics" automatically update the stats?
Thanks in advance
Kim,
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Jul 20, 2005
Hello group.I have an issue, which has bothered me for a while now:I'm wondering why the column statistics, which SQL Server wants me tocreate, if I turn off auto-created statistics, are so important to theoptimizer?Example: from Northwind (with auto create stats off), I do the following:SELECT * FROM Customers WHERE Country = 'Sweden'My query plan show a clustered index scan, which is expected - no indexexists for Country. BUT, the query plan also shows, that the optimizer ismissing a statistic on Country, which tells me, that the optimizer wouldbenefit from knowing this.I cannot see why? (and I've been trying for a while now).If I create the missing statistics, nothing happens in the query plan (andwhy should it?). I could understand it, if the optimizer suggested an indexon Country - this would make sense, but if creating the missing index, queryanalyzer creates the statistics with an empty index, which seems to me to beless than usable.I've been thinking long and hard about this, but haven't been able to reacha conclusion :) It has some relevance to my work, because allowing theoptimizer to create missing statistics limits my options for designingindexes (e.g. covering) for some rather wide tables, so I'm thinking why notturn it off altogether. But I would like to know the consequences - hopesomebody has already delved into this, and knows a good explanation.RgdsJesper
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Aug 1, 2006
What is the unit of the numbers you get in the Time Statistics-part when running a query in Microsoft SQL Server Management Studio with Client Statistics turned on?
Currently I get mostly 0īs, but if I try and *** up a query on purpose I can get
it up to around 30... Is it milliseconds or som made up number based on clockcycles or... ?
I would also like to know if itīs possible to change the precision.
- Nikolaj
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Apr 6, 2008
Hi,I want to save the last modification date when the row is updated. I have a column called "LastModification" in the table, every time the row is update I want to set the value of this column to the current date. So far all I know is that I need to use a trigger and the GetDate() function, but could any body help me with how to set the value of the column to getdate()? thanks for your help.
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Mar 26, 2007
Hi All,
I am playing with DBCC command to check the contsrainst on a perticular table (DBCC CHECKCONSTRAINTS ('myTable') WITH ALL_CONSTRAINTS), it always gives the following result:
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
nothing more than that, anyone can help please?
Cheers,
Riaz
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Mar 5, 2005
For Backup Database i used script
BACKUP DATABSE.
Then after that, i need to check Database inigrity, for that
i used DBCC CHECKDB and DBCC CHECKCATALOG
but, i want to store the result in a text file, after executing these two commends, how to write commend line please help me.
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Nov 9, 1999
Is there a way to simply capture only the Table Name (or tbl ID), Index Name (or Idx ID) and Scan Density information from the output of DBCC Showcontig?
I would like to dump these elements into a table for some additional analysis/queries.
Thank you,
Troy
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Jul 20, 2005
Hi,i'm on windows nt4 sp6a , sql server 7.00.0842i have something that i don't understand.The table 'source' is taking lot of space but when i bcp out, the file takeonly 11MB (fixed delimiter option)i issue showontig and it says me that Avg. Page Density(full).....................: 4.33%so if i understand there are a lot of space wasted per pageso i issue DBCC DBREINDEX('dbo.source', '', 50) and i expect to have Avg.Page Density (full).....................: 50%but it's still the same even after dbcc update usage on that tableat alst, i've done a select * into test from source and the test table takeonly 11MB like the bcp out. (1290 pages insted of 32923 pages of the sourcetable)so what can i do to reduce the 'source' table ?if anayone can help me ?the table 'source' the ddl is :CREATE TABLE dbo.source(f1_id numeric(18,0) NOT NULL,f2_id numeric(18,0) NOT NULL,f3_id numeric(28,0) IDENTITY,f4_id char(300) NOT NULL,CONSTRAINT pk_source_compid_tranidPRIMARY KEY NONCLUSTERED (f1_id,f2_id,f3x_id) WITH FILLFACTOR=50 ON[PRIMARY])sp_spaceused 'source'name rows reserved data index_size unusedsource 29701 287088 KB 263400 KB 23400 KB 288 KBUSE appligoDBCC UPDATEUSAGE('appli', 'dbo.source')WITH COUNT_ROWSgoDBCC SHOWCONTIG(702625546)goDBCC DBREINDEX('dbo.source', '', 50)goDBCC UPDATEUSAGE('appli', 'dbo.source')WITH COUNT_ROWSgoDBCC SHOWCONTIG(702625546)The command executed successfully with no results returned.DBCC execution completed. If DBCC printed error messages, contact yoursystem administrator.DBCC SHOWCONTIG scanning 'source' table...Table: 'source' (702625546); index ID: 0, database ID: 12TABLE level scan performed.- Pages Scanned................................: 32923- Extents Scanned..............................: 4122- Extent Switches..............................: 4121- Avg. Pages per Extent........................: 8.0- Scan Density [Best Count:Actual Count].......: 99.85% [4116:4122]- Extent Scan Fragmentation ...................: 95.41%- Avg. Bytes Free per Page.....................: 7743.9- Avg. Page Density (full).....................: 4.33%DBCC execution completed. If DBCC printed error messages, contact yoursystem administrator.Index (ID = 2) is being rebuilt.Index (ID = 3) is being rebuilt.Index (ID = 4) is being rebuilt.Index (ID = 5) is being rebuilt.Index (ID = 6) is being rebuilt.DBCC execution completed. If DBCC printed error messages, contact yoursystem administrator.DBCC UPDATEUSAGE: sysindexes row updated for table 'source' (index ID 2):USED pages: Changed from (2391) to (2390) pages.RSVD pages: Changed from (2400) to (2401) pages.DBCC UPDATEUSAGE: sysindexes row updated for table 'source' (index ID 3):USED pages: Changed from (201) to (200) pages.RSVD pages: Changed from (208) to (209) pages.DBCC UPDATEUSAGE: sysindexes row updated for table 'source' (index ID 4):USED pages: Changed from (335) to (334) pages.RSVD pages: Changed from (344) to (345) pages.DBCC UPDATEUSAGE: sysindexes row updated for table 'source' (index ID 0):USED pages: Changed from (35843) to (35849) pages.RSVD pages: Changed from (35882) to (35885) pages.DBCC execution completed. If DBCC printed error messages, contact yoursystem administrator.DBCC SHOWCONTIG scanning 'source' table...Table: 'source' (702625546); index ID: 0, database ID: 12TABLE level scan performed.- Pages Scanned................................: 32923- Extents Scanned..............................: 4122- Extent Switches..............................: 4121- Avg. Pages per Extent........................: 8.0- Scan Density [Best Count:Actual Count].......: 99.85% [4116:4122]- Extent Scan Fragmentation ...................: 95.41%- Avg. Bytes Free per Page.....................: 7743.9- Avg. Page Density (full).....................: 4.33%DBCC execution completed. If DBCC printed error messages, contact yoursystem administrator.
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Oct 11, 2007
Greetings.
I'm currently on a company with an ms sql server 2000. I'm looking into the indexes and tables to see if there are some bottlenecks there but the LogicalFramentation is very low in the index I have searched.
However, this table has a logicalFragmentation of 99,9215698242188 which I get when I do DBCC SHOWCONTIG ([TInsurance]) WITH TABLERESULTS. Is that a value to be trusted or not to be trusted since this does not check an index? If it is, how do I defrag a table? I know only how to defrag an index. (example: DBCC INDEXDEFRAG (MFSSEK,[TInsurance], PK_InsuranceID) )
Tipps, suggestions, help, all is very wellcome! :-)
DBCC SHOWCONTIG scanning 'TInsurance' table...
Table: 'TInsurance' (2051694557); index ID: 0, database ID: 17
TABLE level scan performed.
- Pages Scanned................................: 1275
- Extents Scanned..............................: 225
- Extent Switches..............................: 224
- Avg. Pages per Extent........................: 5.7
- Scan Density [Best Count:Actual Count].......: 71.11% [160:225]
- Extent Scan Fragmentation ...................: 74.67%
- Avg. Bytes Free per Page.....................: 520.0
- Avg. Page Density (full).....................: 93.58%
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
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