BI SQL # 200 : SQL Server DBA Scripts : Various SQL Server IO Statistics
Hi Folks,
In this article we are going to cover the Various SQL Server IO Statistics.
In this post we are going to discuss following points:
- Problem Statement of SQL Script:
- Description of SQL Script:
- SQL Script Output Column
- SQL Script Code
- SQL Script Output Screenshot
- User Level to execute
Problem Statement of SQL Script:
Find SQL Server IO Statistics
Description of SQL Script:
This script will help in maintain and check the drive\disk space and read\write information of current system.
SQL Script Output Column
SQL Script Code
WITH IOT AS -- Total sums of all properties. ( SELECT SUM(IOS.num_of_reads) AS Reads ,SUM(IOS.num_of_bytes_read) BytesRead ,SUM(IOS.io_stall_read_ms) AS IoStallReadMs ,SUM(IOS.num_of_writes) AS Writes ,SUM(IOS.num_of_bytes_written) AS BytesWritten ,SUM(IOS.io_stall_write_ms) AS IoStallWritesMs ,SUM(IOS.io_stall) AS IoStall ,SUM(IOS.size_on_disk_bytes) SizeOnDisk FROM sys.dm_io_virtual_file_stats(DEFAULT, DEFAULT) AS IOS ) ,IOF AS ( SELECT DBS.NAME AS DatabaseName ,MF.NAME AS [FileName] ,MF.type_desc AS FileType ,SUBSTRING(MF.physical_name, 1, 3) AS Drive ,CASE WHEN DBS.NAME IN ( 'master' ,'model' ,'msdb' ,'tempdb' ) THEN 1 ELSE 0 END AS IsSystemDB ,IOS.* FROM sys.dm_io_virtual_file_stats(DEFAULT, DEFAULT) AS IOS INNER JOIN sys.databases AS DBS ON IOS.database_id = DBS. database_id INNER JOIN sys.master_files AS MF ON IOS.database_id = MF. database_id AND IOS.file_id = MF.file_id ) SELECT IOF.Drive ,CONVERT(NUMERIC(5, 2), SUM(100.0 * IOF.num_of_reads / IOT. Reads)) AS [Reads%] ,CONVERT(NUMERIC(5, 2), SUM(100.0 * IOF.num_of_bytes_read / IOT.BytesRead)) AS [BytesRead%] ,CONVERT(NUMERIC(5, 2), SUM(100.0 * IOF.io_stall_read_ms / IOT .IoStallReadMs)) AS [IoStallReadMs%] ,CONVERT(NUMERIC(5, 2), SUM(100.0 * IOF.num_of_writes / IOT. Writes)) AS [Writes%] ,CONVERT(NUMERIC(5, 2), SUM(100.0 * IOF.num_of_bytes_written / IOT.BytesWritten)) AS [BytesWritten%] ,CONVERT(NUMERIC(5, 2), SUM(100.0 * IOF.io_stall_write_ms / IOT.IoStallWritesMs)) AS [IoStallWritesMs%] ,CONVERT(NUMERIC(5, 2), SUM(100.0 * IOF.io_stall / IOT.IoStall )) AS [IoStall%] ,CONVERT(NUMERIC(5, 2), SUM(100.0 * IOF.size_on_disk_bytes / IOT.SizeOnDisk)) AS [SizeOnDisk%] FROM IOF CROSS APPLY IOT GROUP BY IOF.Drive ORDER BY IOF.Drive;
SQL Script Output Screenshot
User Level to execute
- 100
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