SQL Server Table Size /Fragmentation
Jun 8, 2000
Hi!,
I have a process(Peoplesoft) in SQL Server which takes long time to finish. I am looking for is there any way to find out fragmentation of the table to defagment it or is there any way to allocate the size for particular table. Couple of users are running the process at same time but as SQL Server has table/page locks it locks and releases after the job is done. Can i make it row level lock by executing sp_tableoption procedure. I would appreciate for all your suggeations.
Thanks,
Mohana
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Jun 10, 2014
It is possible to find table size and in that table each row size.
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Dec 1, 2014
I have bunch of heap tables and the fragmentation seems to be high, i am not sure whether i shall add index for them, as these tables are inserted and updated every day.
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May 8, 2001
hi all,
i have inherited a database running on sql7 sp2. a lot of the tables do not have a clustered index. some of these tables are highly fragmented. below is a sample of the dbcc showcontig output
TABLE level scan performed.
- Pages Scanned................................: 104934
- Extents Scanned..............................: 13124
- Extent Switches..............................: 13123
- Avg. Pages per Extent........................: 8.0
- Scan Density [Best Count:Actual Count].......: 99.95% [13117:13124]
- Extent Scan Fragmentation ...................: 5.84%
- Avg. Bytes Free per Page.....................: 7757.4
- Avg. Page Density (full).....................: 4.16%
this table has 5 non-null char columns whose total length is 43 chars and the table occupies about 900 mb for only about 670,000 rows!
select on the table sucks!
since there is no clustered index i have to rebuild the table to remove the fragmentation. is there a way to reorganize the table without recreating it?
thanx
:-)
hemant
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Dec 7, 2006
Abe writes "i am using SQL server 2000, when i tried to back up the database in SQL server, the backup began failing coz SQL Server could no longer allocate 964kb of contiguous blocks. (the min needed is 1MB)
What causes the memory or blockes to be fragmented?
How do you solve this issue other than rebooting the server?
How do you prevent this from happening or monitor this issue?
Regards,
Abe"
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Aug 14, 2004
hi,
im doing network monitoring app where basically i run a checks on servers every few minutes and log the data to a table. Naturally the table can get big, quite quickly. What I want is to be able to overwrite the table data at the start of each new day. Alternatively, rollup the data into a daily or weekly packets and then overwrite table data. How do i do this?
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Feb 4, 2015
I have a table like below,
CREATE TABLE Student
(
Id BIGINT not null
,Name NCHAR(20) not Null
,Branch NVARCHAR (64) null
)
The table contains : 100000 rows .
1)Number of rows in a data page
2)Total number of pages required for the table
3)Total Table size in KB or MB
4)Total file size in Kb or MB
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Feb 22, 2015
I'm trying to understand what is happening to one large table.
In a DB SQL 2008R2, I'm trying to track a rapidly increasing DB size. It's due to one table recently added.
Despite the table's no rows increasing its size reduces after a scheduled re-index.
I've recorded the space used by this table by recording EXEC sp_spaceused 'tableName'
---
NoRows reserved data index_size unused
128864512300384 KB 2290928 KB9432 KB24 KB AFTER reindex
128864515406232 KB 5366184 KB39280 KB768 KBBEFORE reindex
N.B. The only thing I'm aware of happening in the time period is a reindex as part of scheduled task. I could be missing something else happening.
The table has only one Index the PK which is clustered, No Fill factor is specified. The Server Default fill factor =0.
I read fillfactor=0=100 Will always try and fill the pages so space used will be minimised?
After running the reindex the index fragmentation is v.low. I've not recorded the fragmentation before reindex.
I can see the Data is not added in Clustered index order.
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Jun 18, 2015
I would like to get the size of the tables in my database BUT as follows:
SIZE OF (SELECT * FROM myTable WHERE Section = 1)
...what is the fastest way to do it?
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Jan 20, 2012
I have a table with 99.9% of unused size. How do I reduce the size?I have tried those commands below but they do not work.
ALTER INDEX [VBDATA~0] ON qa2.VBDATA REBUILD
DBCC CLEANTABLE (QA2,"qa2.VBDATA", 0)
WITH NO_INFOMSGS;
GO
ALTER INDEX ALL ON qa2.VBDATA REBUILD
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Feb 25, 2014
Script to do the table partitioning for a 500gb in sliding window technique?
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May 5, 2015
I save Table size and recs. no every day. and check it some days.
...
insert into @t
exec sp_msforeachtable 'exec sp_spaceused ''?'''
...
But Today I saw sudden increase size in a table. about 128 MB in a day. (Average Growth fro this table was 4 or 5 MB in a day)This growth was for Only 4222 Records. While for more number of records (about 7000) in yesterday we had only 2 MB GRowth!
This Table information (Now):
sp_spaceused 'Table1'
Result:
name ---Rows --reserved --data
Table1--1021319--460328 KB --283104 KBI Try to gess The reason. I copy These new records to another table.But The result was more strange : on new table the size of these record was : < 1 MB I copied All records to another table . The size was : 148 MB (while this is 283 MB in my real database)
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Jul 28, 2015
I created a thread 2 days back on a performance problem RE non-trusted check constraints and foreign key constraints. We are planning to make them trusted to see if it works. On the other hand, we see about 50+ clustered/non-clustered indexes with >90% fragmentation but the page counts for all these indexes are in the range between 500-900. I'm reading in the whitepaper that index fragmentation with less than 1000 pages is not a concern.
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Jul 20, 2015
I am having an issue in determining the correct size of a table.
I have a tableA in some DB on transaction server (Enterprise Edition), this table is being replicated in reporting server DB (Standard edition).
When I check the space used by this table in both the databases i see noticeable difference.
I am using EXEC sp_spaceused 'tableA' to determine the space.
Transaction Server
------------------------------------------------------------------------------
name rows reserveddata index_size unused
TableA1439999 695416 KB507048 KB182912 KB 5456 KB
Reporting Server
-------------------------------------------------------------------------------
name rows reserveddata index_size unused
TableA1439999 656904 KB483664 KB172680 KB 560 KB
So I wanted to know what could be the possible reasons for this difference ?
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Mar 2, 2008
Hi,
i use this script that show me the size of each table and do the sum of all the table size.
SELECT
X.[name],
REPLACE(CONVERT(varchar, CONVERT(money, X.[rows]), 1), '.00', '') AS [rows],
REPLACE(CONVERT(varchar, CONVERT(money, X.[reserved]), 1), '.00', '') AS [reserved],
REPLACE(CONVERT(varchar, CONVERT(money, X.[data]), 1), '.00', '') AS [data],
REPLACE(CONVERT(varchar, CONVERT(money, X.[index_size]), 1), '.00', '') AS [index_size],
REPLACE(CONVERT(varchar, CONVERT(money, X.[unused]), 1), '.00', '') AS [unused]
FROM
(SELECT
CAST(object_name(id) AS varchar(50)) AS [name],
SUM(CASE WHEN indid < 2 THEN CONVERT(bigint, [rows]) END) AS [rows],
SUM(CONVERT(bigint, reserved)) * 8 AS reserved,
SUM(CONVERT(bigint, dpages)) * 8 AS data,
SUM(CONVERT(bigint, used) - CONVERT(bigint, dpages)) * 8 AS index_size,
SUM(CONVERT(bigint, reserved) - CONVERT(bigint, used)) * 8 AS unused
FROM sysindexes WITH (NOLOCK)
WHERE sysindexes.indid IN (0, 1, 255)
AND sysindexes.id > 100
AND object_name(sysindexes.id) <> 'dtproperties'
GROUP BY sysindexes.id WITH ROLLUP) AS X
ORDER BY X.[name]
the problem is that the sum of all tables is not the same size when i make a full database backup.
example of this is when i run this query against my database i see a sum of 111,899 KB that they are 111MB,but when
i do full backup to that database the size of this full backup is 1.5GB,why is that and where this size come from?
THX
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Apr 26, 2015
We have a database with a table that contains around 180m records. Each day a further 70k are inserted. No records are ever deleted as this table is used for archiving only.Users are required to perform SELECTs on this table constantly but due to the high number of INSERTs the indexes become very fragmented very quickly. My aim is to avoid daily rebuilds of the indexes which is what our software house is telling us we have to do.
This is the DDL for the table:
CREATE TABLE [dbo].[Inventory](
[EAN] [bigint] NOT NULL,
[Day] [smalldatetime] NOT NULL,
[State] [int] NOT NULL,
[Quantity] [int] NULL,
[StockValue] [float] NULL,
CONSTRAINT [PK_Inventory] PRIMARY KEY CLUSTERED
[code]...
There are also three clustered Indexes on this table each referencing a single column. The problem from my side is that I cannot understand why the three columns in a primary key would also be configured as non-clustered indexes.My solution would be one of the following:
1. Accept the tables are going to be fragmented and require a daily rebuild (don't like this one!)
2. Partition the table
3. Remove the non-clustered Indexes and let the clustered index for the primary key do the work.
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Apr 29, 2015
How can we monitor the all tables in all databases and send notifications to the team.Is there a way to check to find the no of rows and size of a table last month and find out growth % now
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Sep 4, 2007
I am trying to resize a database initial log file from 500M to 2M. I€™m using€?
ALTER DATABASE <DBNAME> MODIFY FILE ( NAME = <DBLOGFILENAME, SIZE = 2 ) "
And I'm getting "MODIFY FILE failed. Specified size is less than current size." I tried going into the database properties and setting the log file to 2M, but it doesn€™t keep the changes.
Any help with this process?
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Mar 1, 2002
I have some question and would like ask experts:
The largest table in our database eats up above 4G . we do "sp_spaceused" for this table.The length of all columns of this table ( just int, char, varchar, money ,numeric fields types) is about 200 bytes, and the table has around 1,300,000 rows, but the reserved spaced for this table is 4,800,000kb and the data space is around 4,600,00kb.
How can average each row take 3.7kb ( the total size of all columns just 200 bytes)? Any other things I need check?
Any one can give any suggestion what cause this problem? or it is normal?
Thank you very much.
Judy
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May 18, 2001
Hello, Everyone,
Can anyone tell me how to find the size of a table in a DB?
Thanks,
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Nov 21, 2000
I'm trying to run a query or sp that will give me a
list of tables and the number of rows in it.
Is there any way for me to do this?
I appreciate the assistance.
Toni
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Dec 21, 1999
I am wondering if there is the limitation of maximum table size in SQL 6.5. I have a table with 2.6GB and 12,000,000 rows in SQL 6.5 database. Is this a problem?
TIA,
Stella Liu
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Jul 15, 1999
Is there a practical size limit, in MB's, of a table in SQL Server 6.5?
Is there a size, that once exceeded, degrades performance signifigantly?
I am speaking of raw megabytes. The table in question will consist of only 3 int columns but has the possiblity of becoming VERY LARGE (+1,000,000 rows). I am still in the design phase and can change my strategy if this will prove to be a problem.
Thanks for any help!
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Jan 14, 1999
hello all,
I am trying to solve this problem for quite some time.. I was wondering if I can get some help..
These questions are all abt. MSSQL 6.5
1. Is there a limit on the size of the table ?
2. Does it make sense to have more tables if the size of the row size is more that the limit set by 6.5 or i should let have more rows in a different table with duplicate entries for a particular field.
3. What is the number of rows before the performance of a query starts getting affected..
Thanks..
Sachin.
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Aug 26, 2002
I created a same table on two different server with same data. I run sp_sapceuse on both server and I got following result
it's useing 392 MB for table
name rows reserved data index_size unused
-------------------------------------------------------------------------------------------------------------------------------- ----------- ------------------ ------------------ ------------------ ------------------
DUNS_SITE 100000 401288 KB 400000 KB 1264 KB 24 KB
its using only 97.3 MB
name rows reserved data index_size unused
-------------------------------------------------------------------------------------------------------------------------------- ----------- ------------------ ------------------ ------------------ ------------------
DUNS_SITE 100000 99720 KB 99376 KB 328 KB 16 KB
WHY?????
Thanks
Manesh
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Jul 19, 2004
Hello,
How can i get the size of a table in sqserver 2000 ?
How can read a image field ?
Thanks for this answer.
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Mar 2, 2005
Is there a maximum or optimum number of rows I should have in a table so that I can have fastest search queries. I am a novice programmer just developed something for my work place.
The database has a table created by converting data from excel spreadsheets. There were 24 spreadsheets for 12 months each having approximately 500 rows. Designed this way the table will have approximately 24 * 500 = 12000 records. Should I consider redesigning the database to make searches faster
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May 25, 2006
Hi all,
How can I find the exact size in the disk occupied by a TABLE ?
When I execute "sp_spaceused" it returns the following parameters for a table
reserved
data
index_size
unused
Which of the parameters I should consider to calculate the exact space occupied by the table.
Thanks in advance,
Hari Haran Arulmozhi
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Jan 19, 2006
Is there any way I can find the size of each table?
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Jul 20, 2005
Is it better to have a table with 10,000 row or 10 tables of 100 rows?
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May 17, 2006
Hello,
If i want to know the size of table then how can i do it in SQL Server 2000 and in SQL Server 2005.
-- how much amount of data can a table store in sql.
-- On which thing the size of table depends.
or Can anyone give me a introduction about the size of table in sql
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May 13, 2008
i want to do fragmentation using SQL 2005 Express. Can their be any helping material for making fragmentation. Any Example
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Mar 29, 2001
What DBCC or otherwise one would be able to find table fragmentation in SQL 7 and how to take some proactive actions ?
Thanks very much for your time.
-Tim
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