How to find the database growth rate?

Question

Wanted to do the forecasting of disk growth for one year. How to find the database growth rate?
Rahul

Answer 1

This is code authored by Richard Ding that will log database sizes to a table.  If you run it every day, then you can go back and compare the database size differences day to day... week to week... month to month... and year over year.  That is
how I forecast growth over time.
Note:  There is a database name required that is local to your environment, so change [YOURDATABASENAME] to whatever local database you wish to use.  I will also post the DDL to create the target table.  Create that table in the database you
name in the stored procedure code and all should run fine.
USE [master]
GO
/****** Object: StoredProcedure [dbo].[sp_SDS] Script Date: 04/22/2015 09:32:53 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[sp_SDS]
@TargetDatabase sysname = NULL, -- NULL: all dbs
@Level varchar(10) = 'Database', -- or "File"
@UpdateUsage bit = 0, -- default no update
@Unit char(2) = 'MB' -- Megabytes, Kilobytes or Gigabytes
AS
** author: Richard Ding
** date: 4/8/2008
** usage: list db size AND path w/o SUMmary
** test code: sp_SDS -- default behavior
** sp_SDS 'maAster'
** sp_SDS NULL, NULL, 0
** sp_SDS NULL, 'file', 1, 'GB'
** sp_SDS 'Test_snapshot', 'Database', 1
** sp_SDS 'Test', 'File', 0, 'kb'
** sp_SDS 'pfaids', 'Database', 0, 'gb'
** sp_SDS 'tempdb', NULL, 1, 'kb'
SET NOCOUNT ON;
IF @TargetDatabase IS NOT NULL AND DB_ID(@TargetDatabase) IS NULL
BEGIN
RAISERROR(15010, -1, -1, @TargetDatabase);
RETURN (-1)
END
IF OBJECT_ID('tempdb.dbo.##Tbl_CombinedInfo', 'U') IS NOT NULL
DROP TABLE dbo.##Tbl_CombinedInfo;
IF OBJECT_ID('tempdb.dbo.##Tbl_DbFileStats', 'U') IS NOT NULL
DROP TABLE dbo.##Tbl_DbFileStats;
IF OBJECT_ID('tempdb.dbo.##Tbl_ValidDbs', 'U') IS NOT NULL
DROP TABLE dbo.##Tbl_ValidDbs;
IF OBJECT_ID('tempdb.dbo.##Tbl_Logs', 'U') IS NOT NULL
DROP TABLE dbo.##Tbl_Logs;
CREATE TABLE dbo.##Tbl_CombinedInfo (
DatabaseName sysname NULL,
[type] VARCHAR(10) NULL,
LogicalName sysname NULL,
T dec(10, 2) NULL,
U dec(10, 2) NULL,
[U(%)] dec(5, 2) NULL,
F dec(10, 2) NULL,
[F(%)] dec(5, 2) NULL,
PhysicalName sysname NULL );
CREATE TABLE dbo.##Tbl_DbFileStats (
Id int identity,
DatabaseName sysname NULL,
FileId int NULL,
FileGroup int NULL,
TotalExtents bigint NULL,
UsedExtents bigint NULL,
Name sysname NULL,
FileName varchar(255) NULL );
CREATE TABLE dbo.##Tbl_ValidDbs (
Id int identity,
Dbname sysname NULL );
CREATE TABLE dbo.##Tbl_Logs (
DatabaseName sysname NULL,
LogSize dec (10, 2) NULL,
LogSpaceUsedPercent dec (5, 2) NULL,
Status int NULL );
DECLARE @Ver varchar(10),
@DatabaseName sysname,
@Ident_last int,
@String varchar(2000),
@BaseString varchar(2000);
SELECT @DatabaseName = '',
@Ident_last = 0,
@String = '',
@Ver = CASE WHEN @@VERSION LIKE '%9.0%' THEN 'SQL 2005'
WHEN @@VERSION LIKE '%8.0%' THEN 'SQL 2000'
WHEN @@VERSION LIKE '%10.0%' THEN 'SQL 2008'
WHEN @@VERSION LIKE '%11.0%' THEN 'SQL 2012'
WHEN @@VERSION LIKE '%12.0%' THEN 'SQL 2014'
END;
SELECT @BaseString =
' SELECT DB_NAME(), ' +
CASE WHEN @Ver = 'SQL 2000' THEN 'CASE WHEN status & 0x40 = 0x40 THEN ''Log'' ELSE ''Data'' END'
ELSE ' CASE type WHEN 0 THEN ''Data'' WHEN 1 THEN ''Log'' WHEN 4 THEN ''Full-text'' ELSE ''reserved'' END' END +
', name, ' +
CASE WHEN @Ver = 'SQL 2000' THEN 'filename' ELSE 'physical_name' END +
', size*8.0/1024.0 FROM ' +
CASE WHEN @Ver = 'SQL 2000' THEN 'sysfiles' ELSE 'sys.database_files' END +
' WHERE '
+ CASE WHEN @Ver = 'SQL 2000' THEN ' HAS_DBACCESS(DB_NAME()) = 1' ELSE 'state_desc = ''ONLINE''' END + '';
SELECT @String = 'INSERT INTO dbo.##Tbl_ValidDbs SELECT name FROM ' +
CASE WHEN @Ver = 'SQL 2000' THEN 'master.dbo.sysdatabases'
WHEN @Ver IN ('SQL 2005', 'SQL 2008', 'SQL 2012', 'SQL 2014') THEN 'master.sys.databases'
END + ' WHERE HAS_DBACCESS(name) = 1 ORDER BY name ASC';
EXEC (@String);
INSERT INTO dbo.##Tbl_Logs EXEC ('DBCC SQLPERF (LOGSPACE) WITH NO_INFOMSGS');
-- For data part
IF @TargetDatabase IS NOT NULL
BEGIN
SELECT @DatabaseName = @TargetDatabase;
IF @UpdateUsage <> 0 AND DATABASEPROPERTYEX (@DatabaseName,'Status') = 'ONLINE'
AND DATABASEPROPERTYEX (@DatabaseName, 'Updateability') <> 'READ_ONLY'
BEGIN
SELECT @String = 'USE [' + @DatabaseName + '] DBCC UPDATEUSAGE (0)';
PRINT '*** ' + @String + ' *** ';
EXEC (@String);
PRINT '';
END
SELECT @String = 'INSERT INTO dbo.##Tbl_CombinedInfo (DatabaseName, type, LogicalName, PhysicalName, T) ' + @BaseString;
INSERT INTO dbo.##Tbl_DbFileStats (FileId, FileGroup, TotalExtents, UsedExtents, Name, FileName)
EXEC ('USE [' + @DatabaseName + '] DBCC SHOWFILESTATS WITH NO_INFOMSGS');
EXEC ('USE [' + @DatabaseName + '] ' + @String);
UPDATE dbo.##Tbl_DbFileStats SET DatabaseName = @DatabaseName;
END
ELSE
BEGIN
WHILE 1 = 1
BEGIN
SELECT TOP 1 @DatabaseName = Dbname FROM dbo.##Tbl_ValidDbs WHERE Dbname > @DatabaseName ORDER BY Dbname ASC;
IF @@ROWCOUNT = 0
BREAK;
IF @UpdateUsage <> 0 AND DATABASEPROPERTYEX (@DatabaseName, 'Status') = 'ONLINE'
AND DATABASEPROPERTYEX (@DatabaseName, 'Updateability') <> 'READ_ONLY'
BEGIN
SELECT @String = 'DBCC UPDATEUSAGE (''' + @DatabaseName + ''') ';
PRINT '*** ' + @String + '*** ';
EXEC (@String);
PRINT '';
END
SELECT @Ident_last = ISNULL(MAX(Id), 0) FROM dbo.##Tbl_DbFileStats;
SELECT @String = 'INSERT INTO dbo.##Tbl_CombinedInfo (DatabaseName, type, LogicalName, PhysicalName, T) ' + @BaseString;
EXEC ('USE [' + @DatabaseName + '] ' + @String);
INSERT INTO dbo.##Tbl_DbFileStats (FileId, FileGroup, TotalExtents, UsedExtents, Name, FileName)
EXEC ('USE [' + @DatabaseName + '] DBCC SHOWFILESTATS WITH NO_INFOMSGS');
UPDATE dbo.##Tbl_DbFileStats SET DatabaseName = @DatabaseName WHERE Id BETWEEN @Ident_last + 1 AND @@IDENTITY;
END
END
-- set used size for data files, do not change total obtained from sys.database_files as it has for log files
UPDATE dbo.##Tbl_CombinedInfo
SET U = s.UsedExtents*8*8/1024.0
FROM dbo.##Tbl_CombinedInfo t JOIN dbo.##Tbl_DbFileStats s
ON t.LogicalName = s.Name AND s.DatabaseName = t.DatabaseName;
-- set used size and % values for log files:
UPDATE dbo.##Tbl_CombinedInfo
SET [U(%)] = LogSpaceUsedPercent,
U = T * LogSpaceUsedPercent/100.0
FROM dbo.##Tbl_CombinedInfo t JOIN dbo.##Tbl_Logs l
ON l.DatabaseName = t.DatabaseName
WHERE t.type = 'Log';
UPDATE dbo.##Tbl_CombinedInfo SET F = T - U, [U(%)] = U*100.0/T;
UPDATE dbo.##Tbl_CombinedInfo SET [F(%)] = F*100.0/T;
IF UPPER(ISNULL(@Level, 'DATABASE')) = 'FILE'
BEGIN
IF @Unit = 'KB'
UPDATE dbo.##Tbl_CombinedInfo
SET T = T * 1024, U = U * 1024, F = F * 1024;
IF @Unit = 'GB'
UPDATE dbo.##Tbl_CombinedInfo
SET T = T / 1024, U = U / 1024, F = F / 1024;
SELECT DatabaseName AS 'Database',
type AS 'Type',
LogicalName,
T AS 'Total',
U AS 'Used',
[U(%)] AS 'Used (%)',
F AS 'Free',
[F(%)] AS 'Free (%)',
PhysicalName
FROM dbo.##Tbl_CombinedInfo
WHERE DatabaseName LIKE ISNULL(@TargetDatabase, '%')
ORDER BY DatabaseName ASC, type ASC;
SELECT CASE WHEN @Unit = 'GB' THEN 'GB' WHEN @Unit = 'KB' THEN 'KB' ELSE 'MB' END AS 'SUM',
SUM (T) AS 'TOTAL', SUM (U) AS 'USED', SUM (F) AS 'FREE' FROM dbo.##Tbl_CombinedInfo;
END
IF UPPER(ISNULL(@Level, 'DATABASE')) = 'DATABASE'
BEGIN
DECLARE @Tbl_Final TABLE (
DatabaseName sysname NULL,
TOTAL dec (10, 2),
[=] char(1),
used dec (10, 2),
[used (%)] dec (5, 2),
[+] char(1),
free dec (10, 2),
[free (%)] dec (5, 2),
[==] char(2),
Data dec (10, 2),
Data_Used dec (10, 2),
[Data_Used (%)] dec (5, 2),
Data_Free dec (10, 2),
[Data_Free (%)] dec (5, 2),
[++] char(2),
Log dec (10, 2),
Log_Used dec (10, 2),
[Log_Used (%)] dec (5, 2),
Log_Free dec (10, 2),
[Log_Free (%)] dec (5, 2) );
INSERT INTO @Tbl_Final
SELECT x.DatabaseName,
x.Data + y.Log AS 'TOTAL',
'=' AS '=',
x.Data_Used + y.Log_Used AS 'U',
(x.Data_Used + y.Log_Used)*100.0 / (x.Data + y.Log) AS 'U(%)',
'+' AS '+',
x.Data_Free + y.Log_Free AS 'F',
(x.Data_Free + y.Log_Free)*100.0 / (x.Data + y.Log) AS 'F(%)',
'==' AS '==',
x.Data,
x.Data_Used,
x.Data_Used*100/x.Data AS 'D_U(%)',
x.Data_Free,
x.Data_Free*100/x.Data AS 'D_F(%)',
'++' AS '++',
y.Log,
y.Log_Used,
y.Log_Used*100/y.Log AS 'L_U(%)',
y.Log_Free,
y.Log_Free*100/y.Log AS 'L_F(%)'
FROM
( SELECT d.DatabaseName,
SUM(d.T) AS 'Data',
SUM(d.U) AS 'Data_Used',
SUM(d.F) AS 'Data_Free'
FROM dbo.##Tbl_CombinedInfo d WHERE d.type = 'Data' GROUP BY d.DatabaseName ) AS x
JOIN
( SELECT l.DatabaseName,
SUM(l.T) AS 'Log',
SUM(l.U) AS 'Log_Used',
SUM(l.F) AS 'Log_Free'
FROM dbo.##Tbl_CombinedInfo l WHERE l.type = 'Log' GROUP BY l.DatabaseName ) AS y
ON x.DatabaseName = y.DatabaseName;
IF @Unit = 'KB'
UPDATE @Tbl_Final SET TOTAL = TOTAL * 1024,
used = used * 1024,
free = free * 1024,
Data = Data * 1024,
Data_Used = Data_Used * 1024,
Data_Free = Data_Free * 1024,
Log = Log * 1024,
Log_Used = Log_Used * 1024,
Log_Free = Log_Free * 1024;
IF @Unit = 'GB'
UPDATE @Tbl_Final SET TOTAL = TOTAL / 1024,
used = used / 1024,
free = free / 1024,
Data = Data / 1024,
Data_Used = Data_Used / 1024,
Data_Free = Data_Free / 1024,
Log = Log / 1024,
Log_Used = Log_Used / 1024,
Log_Free = Log_Free / 1024;
DECLARE @GrantTotal dec(11, 2);
SELECT @GrantTotal = SUM(TOTAL) FROM @Tbl_Final;
INSERT INTO [YOURDATABASENAME].[dbo].[DBSize]
([Weight]
,[DBName]
,[Used]
,[Free]
,[Total]
,[Data]
,[Data_Used]
,[Log]
,[Log_Used]
,[DT])
SELECT
CONVERT(dec(10, 2), TOTAL*100.0/@GrantTotal) AS 'WEIGHT (%)',
DatabaseName AS 'DATABASE',
CONVERT(VARCHAR(12), used) AS 'USED',
CONVERT(VARCHAR(12), free) AS 'FREE',
TOTAL,
CONVERT(VARCHAR(12), Data) AS 'DATA',
CONVERT(VARCHAR(12), Data_Used) AS 'DATA_USED',
CONVERT(VARCHAR(12), Log) AS 'LOG',
CONVERT(VARCHAR(12), Log_Used) AS 'LOG_USED',
GETDATE()
FROM @Tbl_Final
WHERE DatabaseName LIKE ISNULL(@TargetDatabase, '%')
ORDER BY DatabaseName ASC;
IF @TargetDatabase IS NULL
SELECT CASE WHEN @Unit = 'GB' THEN 'GB' WHEN @Unit = 'KB' THEN 'KB' ELSE 'MB' END AS 'SUM',
SUM (used) AS 'USED',
SUM (free) AS 'FREE',
SUM (TOTAL) AS 'TOTAL',
SUM (Data) AS 'DATA',
SUM (Log) AS 'LOG'
FROM @Tbl_Final;
END
RETURN (0)
GO
USE [YOURDATABASENAME]
GO
/****** Object: Table [dbo].[DBSize] Script Date: 04/22/2015 09:49:10 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[DBSize](
[UID] [int] IDENTITY(1,1) NOT NULL,
[Weight] [decimal](18, 2) NULL,
[DBName] [varchar](250) NULL,
[Used] [decimal](18, 2) NULL,
[Free] [decimal](18, 2) NULL,
[Total] [decimal](18, 2) NULL,
[Data] [decimal](18, 2) NULL,
[Data_Used] [decimal](18, 2) NULL,
[Log] [decimal](18, 2) NULL,
[Log_Used] [decimal](18, 2) NULL,
[DT] [datetime] NULL,
CONSTRAINT [PK_DBSize] PRIMARY KEY CLUSTERED
[UID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO