Verificações de integridade proativas do SQL Server, parte 1:espaço em disco

O que verificar

• Tamanho de cada arquivo de registro
• Tamanho de cada arquivo de dados
• Espaço livre em cada arquivo de dados
• Espaço livre em cada unidade com arquivos de banco de dados
• Espaço livre em cada unidade com arquivos de backup

Crescimento do arquivo de log

• O banco de dados está em recuperação COMPLETA e os backups de log de transações não estão sendo feitos por algum motivo
• Alguém executa uma única transação muito grande que consome todo o espaço de log existente, forçando o arquivo a crescer

USE [Baselines];
GO
 
IF (NOT EXISTS (SELECT * 
                 FROM INFORMATION_SCHEMA.TABLES 
                 WHERE TABLE_SCHEMA = 'dbo' 
                 AND  TABLE_NAME = 'SQLskills_TrackLogSpace'))
 
BEGIN
	CREATE TABLE [dbo].[SQLskills_TrackLogSpace](
		[DatabaseName] [VARCHAR](250) NULL,
		[LogSizeMB] [DECIMAL](38, 0) NULL,
		[LogSpaceUsed] [DECIMAL](38, 0) NULL,
		[LogStatus] [TINYINT] NULL,
		[CaptureDate] [DATETIME2](7) NULL
	) ON [PRIMARY];
 
	ALTER TABLE [dbo].[SQLskills_TrackLogSpace] ADD  DEFAULT (SYSDATETIME()) FOR [CaptureDate];
 
END
 
CREATE TABLE #LogSpace_Temp (
	DatabaseName VARCHAR(100),
	LogSizeMB DECIMAL(10,2),
	LogSpaceUsed DECIMAL(10,2),
	LogStatus VARCHAR(1)
	);
 
INSERT INTO #LogSpace_Temp EXEC('dbcc sqlperf(logspace)');
 
INSERT INTO Baselines.dbo.SQLskills_TrackLogSpace 
	(DatabaseName, LogSizeMB, LogSpaceUsed, LogStatus)
	SELECT DatabaseName, LogSizeMB, LogSpaceUsed, LogStatus
	FROM #LogSpace_Temp;
 
DROP TABLE #LogSpace_Temp;

Tamanho e espaço livre em arquivos de dados

SELECT 
    [file_id] AS [File ID],
    [type] AS [File Type],
    substring([physical_name],1,1) AS [Drive],
    [name] AS [Logical Name],
    [physical_name] AS [Physical Name],
    CAST([size] as DECIMAL(38,0))/128. AS [File Size MB], 
    CAST(FILEPROPERTY([name],'SpaceUsed') AS DECIMAL(38,0))/128. AS [Space Used MB], 
    (CAST([size] AS DECIMAL(38,0))/128) - (CAST(FILEPROPERTY([name],'SpaceUsed') AS DECIMAL(38,0))/128.) AS [Free Space],
    [max_size] AS [Max Size],
    [is_percent_growth] AS [Percent Growth Enabled],
    [growth] AS [Growth Rate],
    SYSDATETIME() AS [Current Date]
FROM sys.database_files;

Espaço do Drive

SELECT DISTINCT
  vs.volume_mount_point AS [Drive],
  vs.logical_volume_name AS [Drive Name],
  vs.total_bytes/1024/1024 AS [Drive Size MB],
  vs.available_bytes/1024/1024 AS [Drive Free Space MB]
FROM sys.master_files AS f
CROSS APPLY sys.dm_os_volume_stats(f.database_id, f.file_id) AS vs
ORDER BY vs.volume_mount_point;

Backups

Usando o Performance Advisor

SELECT MIN(FreeSpace*100.0/Size)
  FROM SQLSentry.dbo.PerformanceAnalysisDeviceLogicalDisk;

SELECT Alert = MAX(CASE 
  WHEN Name = N'C:' AND [FreeSpace%] < 10 THEN 1
  WHEN Name = N'S:' AND [FreeSpace%] < 25 THEN 1
  WHEN Name = N'T:' AND [FreeSpace%] < 20 THEN 1
  ELSE 0 END)
FROM 
(
  SELECT 
	d.Name, 
	d.FreeSpace * 100.0/d.Size AS [FreeSpace%]
  FROM SQLSentry.dbo.PerformanceAnalysisDeviceLogicalDisk AS d
  INNER JOIN SQLSentry.dbo.EventSourceConnection AS c
  ON d.DeviceID = c.DeviceID
  WHERE c.ObjectName = N'HANK\SQL2012' -- replace with your server/instance
) AS s;

Resumo