Table Data Sizes

  • ngreene

    SSC-Addicted

    Points: 461

    Comments posted to this topic are about the item Table Data Sizes

  • WILLIAM MITCHELL

    SSChampion

    Points: 13701

    CREATE TABLE #temp

    (

    [name] nvarchar(128),

    [rows] char(11),

    [reserved] varchar(18),

    [data] varchar(18),

    [index_size] varchar(18),

    [unused] varchar(18)

    )

    INSERT INTO #temp

    EXEC sp_MSforeachtable @command1="EXEC sp_spaceused '?' "

    SELECT

    [name] AS TableName,

    CAST([rows] AS int) AS NumOfRows,

    CAST(REPLACE([reserved],' KB','') AS int) AS [TotalKB]

    FROM

    #temp

    ORDER BY 3 DESC

    SELECT SUM(CAST(REPLACE([reserved],' KB','') AS int)) AS TotalKB_data FROM #temp

    DROP TABLE #temp

  • sharath.chalamgari

    SSCertifiable

    Points: 5680

    This code looks much simple than in the article

  • tskelley

    SSCommitted

    Points: 1870

    Thanks, William. I was going to post a fix for string sort on reserved, but you caught it.

    And thank you ngreene for posting your solution.

  • SanDroid

    SSChampion

    Points: 10068

    Thank you William for posting some code that actually will execute here.

    The other code posted in the article would not execute in SQL 2008 R2 SSMS.

  • TravisDBA

    SSCoach

    Points: 15780

    Way too complicated of a solution for what is needed here. Here the information is in one SELECT statement from three system tables that gives you all the same basic information that sp_spaceused does and without any looping, using TEMP tables, or cursors, and orders then by the largest rows first to boot!. KISS. 😀

    SELECT

    sysusers.name as TABLE_USER,

    sysobjects.name as TABLE_NAME,

    sum(sysindexes.rowcnt) as ROWS,

    sum(case when sysindexes.indid in (0, 1, 255) then convert(dec(15),reserved*8)else 0 end) as RESERVED_Kb,

    sum(case when sysindexes.indid < 2 THEN convert(dec(15),dpages*8) ELSE 0 END) +

    sum(case when sysindexes.indid = 255 THEN convert(dec(15),used*8) ELSE 0 END) AS DATA_Kb,

    (sum(case when sysindexes.indid in (0, 1, 255) then convert(dec(15),used*8) ELSE 0 END) -

    sum(case when sysindexes.indid < 2 THEN convert(dec(15),dpages*8) ELSE 0 END) -

    sum(case when sysindexes.indid = 255 THEN convert(dec(15),used*8) ELSE 0 END)) AS INDEX_SIZE_Kb,

    sum(case when sysindexes.indid in (0, 1, 255) then convert(dec(15),(reserved - used)*8) else 0 end) AS UNUSED_Kb

    FROM sysobjects (NOLOCK) INNER JOIN

    sysindexes (NOLOCK) ON sysobjects.id = sysindexes.id

    INNER JOIN sysusers (NOLOCK) ON sysobjects.uid = sysusers.uid

    WHERE (sysobjects.type = 'U')

    group by sysusers.name, sysobjects.name

    ORDER BY ROWS DESC

    GO

    "Technology is a weird thing. It brings you great gifts with one hand, and it stabs you in the back with the other. ...:-D"

  • SanDroid

    SSChampion

    Points: 10068

    WOW!!!

    Two good replacement scripts.

    However there is great sadness for the readers and users.

    Each script returns a differant value in KB for [Reserved].:w00t:

    Travis:

    TABLE_USER TABLE_NAME ROWS RESERVED_Kb

    dbo TN_AuditLog 257106 455120

    William:

    TableName NumOfRows TotalKB

    TN_AuditLog 128553 732376

    Would the real Table size script please stand up?

    HINT: The 2008 SSMS UI tells me that TN_AuditLog RowCount = 128553, the Data space is 710 MB

    😎

  • David Bird

    SSCarpal Tunnel

    Points: 4669

    Thanks ngreene for sharing your script. Without it this forum topic and sharing of scripts would not of happened.

    SanDroid my visual tests show the results are the same for both scripts except that TravisDBA script does not handle tables with a dbo schema. I do not know why.

    WILLIAM MITCHELL script shows all tables but does not display the schema because Microsoft sp_spaceused does not report it.

    Last week I finished a similar script that collects row counts and table sizes for all databases in an instance. It is a bit more complicated and still needs more testing to confirm its accuracy. The code is based on other published SQL scripts for which do I give credit to in the comments. It is being tested on SQL Server 2000, 2005, 2008 and 2008 R2. I will be adding it to the SQL Overview Package[/url].

    My experience in the past has shown sp_spaceused sizes can be off and the row counts from sysindexes are based on SQL Server optimization statistics that may not always be accurate.

    Here is my code

    USE [tempdb]

    GO

    -- Create Temp Table to collect data

    IF EXISTS (SELECT *

    FROM tempdb.dbo.sysobjects

    WHERE id = OBJECT_ID(N'[tempdb].[dbo].[temp_CapturerSpaceUsed]')

    )

    DROP TABLE [tempdb].[dbo].[temp_CapturerSpaceUsed]

    GO

    CREATE TABLE [TEMPDB].[dbo].[temp_CapturerSpaceUsed](

    [Server] [nvarchar](128) DEFAULT @@SERVERNAME,

    [DatabaseName] [nvarchar](128) NULL,

    [TableSchema] [nvarchar](50) NOT NULL,

    [TableName] [nvarchar](128) NOT NULL,

    [Rows_cnt] [nvarchar](32) NOT NULL,

    [ReservedKB] [nvarchar](32) NOT NULL,

    [DataKB] [nvarchar](32) NOT NULL,

    [IndexSzKB] [nvarchar](32) NOT NULL,

    [UnusedKB] [nvarchar](32) NOT NULL,

    [Package_run_date] [datetime] DEFAULT CURRENT_TIMESTAMP

    ) ON [PRIMARY]

    GO

    --------------------------------------------------

    -- Create Stored procedure to load data into table

    IF OBJECT_ID(N'[dbo].[usp_CapturerSpaceUsed]') IS NOT NULL

    DROP PROCEDURE [dbo].[usp_CapturerSpaceUsed];

    GO

    SET ANSI_NULLS ON

    GO

    SET QUOTED_IDENTIFIER ON

    GO

    CREATE PROCEDURE [usp_CapturerSpaceUsed]

    @DatabaseName NVARCHAR(128)

    AS

    BEGIN

    SET NOCOUNT ON;

    ---------------------------------------------------------------------------

    ---------------------------------------------------------------------------

    -- Posts used as a references in creating this stored procedure

    -- http://www.novicksoftware.com/Articles/sql-server-table-space-reporting-sp_spaceused.htm

    -- http://www.sqlservercentral.com/scripts/Miscellaneous/30317/

    DECLARE @TableSchema NVARCHAR(50)

    DECLARE @TableName NVARCHAR(600)

    DECLARE @SQL NVARCHAR(2000)

    DECLARE @I AS INT

    DECLARE @Row_Count AS INT

    SET @I = 1

    -- Get list of tabes in database \IF OBJECT_ID('tempdb..#TableList') IS NOT NULL DROP TABLE #TableList

    CREATE TABLE #TableList (ID_num int IDENTITY(1,1),TableSchema NVARCHAR (50),TableName NVARCHAR (128) )

    INSERT INTO #TableList (TableSchema,TableName) EXEC ('SELECT TABLE_SCHEMA, TABLE_NAME FROM [' + @DatabaseName + '].INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = ''BASE TABLE'' ORDER BY 1,2;')

    -- Create table to capture resulst from sp_spaceused

    IF OBJECT_ID('tempdb..#sp_spaceused') IS NOT NULL DROP TABLE #sp_spaceused

    CREATE TABLE #sp_spaceused (TableName NVARCHAR (128) ,[Rows_cnt] [nvarchar](32),[ReservedKB] [nvarchar](32),[DataKB] [nvarchar](32),[IndexSzKB] [nvarchar](32),[UnusedKB] [nvarchar](32))

    SET @Row_Count = (SELECT COUNT(*) FROM #TableList)

    -- Cursorless loop

    WHILE @I <= @Row_Count

    BEGIN

    -- The replace is used to handle table names with apostophes

    SELECT @TableSchema = TableSchema, @TableName = REPLACE(TableName,'''','''''')

    FROM #TableList WHERE ID_Num = @I;

    -- Get sp_spaceused data

    SET @SQL = '[' + @DatabaseName + ']..sp_spaceused @objname=''[' + @TableSchema + '].[' + @TableName + ']''';

    -- SELECT @SQL

    DELETE FROM #sp_spaceused ;

    INSERT INTO #sp_spaceused EXEC (@SQL);

    -- Save sp_spaceused data with server, database, and table schema

    INSERT INTO [tempdb].[dbo].[temp_CapturerSpaceUsed]

    ([Server]

    ,[DatabaseName]

    ,[TableSchema]

    ,[TableName]

    ,[Rows_cnt]

    ,[ReservedKB]

    ,[DataKB]

    ,[IndexSzKB]

    ,[UnusedKB]

    ,[Package_run_date])

    SELECT @@SERVERNAME, @DatabaseName, @TableSchema, TableName

    ,[Rows_cnt],[ReservedKB],[DataKB],[IndexSzKB],[UnusedKB], current_timestamp

    FROM #sp_spaceused;

    SET @I = @I + 1

    END

    DROP TABLE #TableList

    DROP TABLE #sp_spaceused

    END

    GO

    --------------------------------------------------

    -- Process each database

    SET NOCOUNT ON

    DECLARE @DBName NVARCHAR(128)

    DECLARE db_cursor CURSOR FOR

    SELECT name

    FROM master.dbo.sysdatabases

    WHERE name <> 'TEMPDB'

    AND CONVERT(nvarchar(128),DATABASEPROPERTYEX(name,'Status')) = 'ONLINE'

    ORDER BY name

    OPEN db_cursor

    FETCH NEXT FROM db_cursor

    INTO @DBName

    WHILE @@FETCH_STATUS = 0

    BEGIN

    EXEC [usp_CapturerSpaceUsed] @DatabaseName = @DBName

    FETCH NEXT FROM db_cursor

    INTO @DBName

    END

    CLOSE db_cursor

    DEALLOCATE db_cursor

    GO

    --------------------------------------------------

    -- Cleanup

    USE tempdb

    GO

    IF OBJECT_ID(N'[dbo].[usp_CapturerSpaceUsed]') IS NOT NULL

    DROP PROCEDURE [dbo].[usp_CapturerSpaceUsed];

    GO

    SELECT [Server]

    ,[DatabaseName]

    ,[TableSchema]

    ,[TableName]

    ,CAST ([Rows_cnt] AS decimal(18, 0)) AS [Rows_cnt]

    ,CAST (REPLACE([ReservedKB], ' KB','') AS decimal(18, 0)) AS [ReservedKB]

    ,CAST (REPLACE([DataKB], ' KB','') AS decimal(18, 0)) AS [DataKB]

    ,CAST (REPLACE([IndexSzKB], ' KB','') AS decimal(18, 0)) AS [IndexSzKB]

    ,CAST (REPLACE([UnusedKB], ' KB','') AS decimal(18, 0)) AS [UnusedKB]

    ,[Package_run_date]

    FROM [tempdb].[dbo].[temp_CapturerSpaceUsed]

    ORDER BY [Rows_cnt] DESC

    David Bird

  • SanDroid

    SSChampion

    Points: 10068

    David Bird (12/8/2010)


    SanDroid my visual tests show the results are the same for both scripts except that TravisDBA script does not handle tables with a dbo schema. I do not know why.

    Neither do I since all the tables I tested it against have only a DBO schema and the ROW count was off by 12 million rows on the first table.

    Could it be that his script was counting table rows and table index rows?

    BTW: I tested your script and it is scary. It took forever to complete, and does not sort correctly on the Rows_cnt or ReservedKB columns. Perhaps storing an Int as an Int would be more efficient?

    In the 9GB OLTP live database I tested it against; Williams solution was the only one that found the largest table in the DB and listed it as the first row of the select. I tried ordering by Rows and TotalKB (ReservedKB).

  • David Bird

    SSCarpal Tunnel

    Points: 4669

    SanDroid,

    You are right about the order. The columns types where still character because that is how sp_spaceused returnsthem. I updated the code with a a select that converts them to numbers without the trailing "KB" text, the order is set for row counts.

    To get the total space used by a table you have to add the 4 KB columns together and order by the result. At least that is my theory.

    Its does run longer than I would like for the 6,000+ tables in the instance I test with.

    David Bird

  • TravisDBA

    SSCoach

    Points: 15780

    Please do remember that sysindexes.rowcnt is only as correct as your latest indexes and stats are up to date. If you have not done this in a while then that column will not be correct.:-D

    "Technology is a weird thing. It brings you great gifts with one hand, and it stabs you in the back with the other. ...:-D"

  • TravisDBA

    SSCoach

    Points: 15780

    After conversing with SanDroid, I have amended this query slightly so that the schema name and indid is displayed as well. Not all of you may need to see all of this detail. If so, just filter it out. Notice the sysusers join doesn't always match up sometimes.:-D

    SELECT

    sys.schemas.name as [Schema Name],

    sysusers.name as TABLE_USER,

    sysobjects.name as TABLE_NAME,

    sysindexes.rowcnt as ROWS,

    sysindexes.indid as [Index],

    sum(case when sysindexes.indid in (0, 1, 255) then convert(dec(15),reserved*8)else 0 end) as RESERVED_Kb,

    sum(case when sysindexes.indid < 2 THEN convert(dec(15),dpages*8) ELSE 0 END) +

    sum(case when sysindexes.indid = 255 THEN convert(dec(15),used*8) ELSE 0 END) AS DATA_Kb,

    (sum(case when sysindexes.indid in (0, 1, 255) then convert(dec(15),used*8) ELSE 0 END) -

    sum(case when sysindexes.indid < 2 THEN convert(dec(15),dpages*8) ELSE 0 END) -

    sum(case when sysindexes.indid = 255 THEN convert(dec(15),used*8) ELSE 0 END)) AS INDEX_SIZE_Kb,

    sum(case when sysindexes.indid in (0, 1, 255) then convert(dec(15),(reserved - used)*8) else 0 end) AS UNUSED_Kb

    FROM sysobjects (NOLOCK)

    INNER JOIN sysindexes (NOLOCK) ON sysobjects.id = sysindexes.id

    LEFT JOIN sysusers (NOLOCK) ON sysobjects.uid = sysusers.uid

    LEFT JOIN sys.schemas (NOLOCK) ON sysobjects.UID = sys.schemas.schema_id

    WHERE (sysobjects.type = 'U')

    AND (sysindexes.indid = 1)

    group by sys.schemas.name,sysusers.name, sysobjects.name,sysindexes.rowcnt,sysindexes.indid

    ORDER BY ROWS DESC, [SCHEMA NAME],TABLE_NAME

    GO

    "Technology is a weird thing. It brings you great gifts with one hand, and it stabs you in the back with the other. ...:-D"

  • David Bird

    SSCarpal Tunnel

    Points: 4669

    TravisDBA,

    I notice some tables where still being skipped after your latest changes. The query excludes tables without a clustered index.

    To include them, modify the where clause to use (sysindexes.indid <= 1) .

    The Adventureworks database has a few tables that use HEAP instead of a clustered index. This makes it a good database to test the query against.

    David Bird

  • TravisDBA

    SSCoach

    Points: 15780

    Yes,you can do that or just comment that clause out and you will see more...:-D

    "Technology is a weird thing. It brings you great gifts with one hand, and it stabs you in the back with the other. ...:-D"

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