查看CPU、内存、磁盘的使用情况

--查看内存信息
SELECT CEILING(total_physical_memory_kb * 1.0 / 1024 / 1024)  AS [物理内存大小]
    ,CAST(available_physical_memory_kb * 1.0 / 1024 / 1024
                       AS DECIMAL(8, 4)) AS [未使用的内存大小]
    ,CAST(( total_physical_memory_kb - available_physical_memory_kb ) * 1.0
    / 1024 / 1024 AS DECIMAL(8, 4))              AS [已使用的内存大小]
    ,CAST(system_cache_kb*1.0 / 1024/1024 AS DECIMAL(8, 4)) AS [系统缓存大小]
FROM  sys.dm_os_sys_memory

--查看CPU的型号
EXEC xp_instance_regread
  'HKEY_LOCAL_MACHINE',
  'HARDWARE\DESCRIPTION\System\CentralProcessor\0',
  'ProcessorNameString';

--查询每个磁盘的信息，包括已经使用的和未使用的信息
SET NOCOUNT ON
DECLARE @Result   INT;
DECLARE @objectInfo   INT;
DECLARE @DriveInfo   CHAR(1);
DECLARE @TotalSize   VARCHAR(20);
DECLARE @OutDrive   INT;
DECLARE @UnitMB   BIGINT;
DECLARE @FreeRat   FLOAT;
SET @UnitMB = 1048576;
--创建临时表保存服务器磁盘容量信息
CREATE TABLE #DiskCapacity
(
[DiskCD]   CHAR(1) ,
FreeSize   INT   ,
TotalSize   INT
);
INSERT #DiskCapacity([DiskCD], FreeSize )
EXEC master.dbo.xp_fixeddrives;
EXEC sp_configure 'show advanced options', 1
RECONFIGURE WITH OVERRIDE;
EXEC sp_configure 'Ole Automation Procedures', 1;
RECONFIGURE WITH OVERRIDE;
EXEC @Result = master.sys.sp_OACreate 'Scripting.FileSystemObject',@objectInfo OUT;
DECLARE CR_DiskInfo CURSOR LOCAL FAST_FORWARD
FOR
SELECT DiskCD FROM #DiskCapacity
ORDER by DiskCD
OPEN CR_DiskInfo;
FETCH NEXT FROM CR_DiskInfo INTO @DriveInfo
WHILE @@FETCH_STATUS=0
BEGIN
EXEC @Result = sp_OAMethod @objectInfo,'GetDrive', @OutDrive OUT, @DriveInfo
EXEC @Result = sp_OAGetProperty @OutDrive,'TotalSize', @TotalSize OUT
UPDATE #DiskCapacity
SET TotalSize=@TotalSize/@UnitMB
WHERE DiskCD=@DriveInfo
FETCH NEXT FROM CR_DiskInfo INTO @DriveInfo
END
CLOSE CR_DiskInfo
DEALLOCATE CR_DiskInfo;
EXEC @Result=sp_OADestroy @objectInfo
EXEC sp_configure 'show advanced options', 1
RECONFIGURE WITH OVERRIDE;
EXEC sp_configure 'Ole Automation Procedures', 0;
RECONFIGURE WITH OVERRIDE;
EXEC sp_configure 'show advanced options', 0
RECONFIGURE WITH OVERRIDE;
SELECT DiskCD   AS [Drive CD]   ,
  STR(TotalSize*1.0/1024,6,2)   AS [Total Size(GB)] ,
  STR((TotalSize - FreeSize)*1.0/1024,6,2)   AS [Used Space(GB)] ,
  STR(FreeSize*1.0/1024,6,2)   AS [Free Space(GB)] ,
  STR(( TotalSize - FreeSize)*1.0/(TotalSize)* 100.0,6,2) AS [Used Rate(%)]  ,
  STR(( FreeSize * 1.0/ ( TotalSize ) ) * 100.0,6,2)    AS [Free Rate(%)]
FROM #DiskCapacity;
DROP TABLE #DiskCapacity;