BI SQL # 184 : SQL Server DBA Scripts : Pending IO Requests
Hi Folks,
In this article we are going to cover Pending IO Requests.
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 Pending IO Requests.
Description of SQL Script:
This Transact-SQL script lists all Pending IO Requests.
SQL Script Output Column
SQL Script Code
WITH pir AS ( SELECT PIR.scheduler_address ,COUNT(*) AS PendIoRequests ,SUM(PIR.io_pending_ms_ticks) AS PendWaitTime FROM sys.dm_io_pending_io_requests AS PIR GROUP BY PIR.scheduler_address ) ,req AS ( SELECT ER.task_address ,COUNT(*) AS ReqCnt ,COUNT(DISTINCT ER.database_id) AS ReqDbCnt ,SUM(ER.wait_time) AS ReqWaitTime FROM sys.dm_exec_requests AS ER GROUP BY ER.task_address ) SELECT OS.scheduler_id AS Scheduler ,OS.cpu_id AS CpuId ,CASE WHEN OS.scheduler_id < 1048576 THEN 'Query' ELSE 'Internal' END AS Scheduler ,OS.[status] AS OsStatus ,OS.current_workers_count AS CurrWrk ,OS.active_workers_count AS ActWrk ,OS.pending_disk_io_count AS pDiskIo ,OW.pending_io_count AS pIoCount ,OW.pending_io_byte_count AS pIoBytes ,OW.[state] AS WorkerState ,req.ReqDbCnt ,req.ReqCnt ,req.ReqWaitTime ,pir.PendIoRequests ,pir.PendWaitTime FROM sys.dm_os_schedulers AS OS INNER JOIN sys.dm_os_workers AS OW ON OS.active_worker_address = OW .worker_address -- Change it to INNER join to get only pending schedulers LEFT JOIN pir ON pir.scheduler_address = OS.scheduler_address LEFT JOIN req ON req.task_address = OW.task_address ORDER BY OS.scheduler_id;
SQL Script Output Screenshot
User Level to execute
300
Hope you will like to Pending IO Requests.
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