Comments on: SQL SERVER – DMV – sys.dm_os_waiting_tasks and sys.dm_exec_requests – Wait Type – Day 4 of 28 http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/ Personal Notes of Pinal Dave Fri, 17 May 2013 15:26:57 +0000 hourly 1 http://wordpress.com/ By: SQL SERVER – Weekly Series – Memory Lane – #015 « SQL Server Journey with SQL Authority http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-419691 Sat, 09 Feb 2013 01:31:09 +0000 http://blog.sqlauthority.com/?p=11476#comment-419691 [...] DMV – sys.dm_os_waiting_tasks and sys.dm_exec_requests – Wait Type – Day 4 of 28 [...]

]]> By: Maciej Egermeier http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-419084 Thu, 07 Feb 2013 12:24:58 +0000 http://blog.sqlauthority.com/?p=11476#comment-419084 I have the same problem. Blank result.

]]> By: Michael Chau http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-358209 Wed, 10 Oct 2012 07:24:28 +0000 http://blog.sqlauthority.com/?p=11476#comment-358209 why a running query also has wait_type ??

]]> By: Don http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-330978 Wed, 15 Aug 2012 17:50:19 +0000 http://blog.sqlauthority.com/?p=11476#comment-330978 my results are blank when I run this (0 row(s) affected)

]]> By: Vundavalli Siva Prasad http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-263607 Fri, 16 Mar 2012 08:08:51 +0000 http://blog.sqlauthority.com/?p=11476#comment-263607 Hi Pinal,

Thank you very much for detailed explanation on wait times.
Could you please provide me some detailed info on exec_context_id column in sys.dm_os_waiting_tasks?

For a session_id I have different exec_context_ids and they were getting blocked by these context_ids.

For example

session_id exec_context_id wait_type blocking_session_id blocking_exec_context_id
75 4 CXPACKET 75 11
75 8 PAGEIOLATCH_EX NULL NULL
75 9 CXPACKET 75 11
75 9 CXPACKET 75 11
75 12 CXPACKET 75 11
75 12 PAGEIOLATCH_EX NULL NULL
75 0 PAGEIOLATCH_EX NULL NULL
75 3 CXPACKET 75 11
75 7 PAGEIOLATCH_EX NULL NULL
75 10 PAGEIOLATCH_EX NULL NULL
75 10 CXPACKET 75 11
75 11 CXPACKET 75 11
75 11 CXPACKET 75 8

Could you please check above details and suggest me whether there is any problem with wait times or not.

Thanks,
Siva Prasad

]]> By: Kajal Kaur http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-183223 Tue, 25 Oct 2011 06:22:12 +0000 http://blog.sqlauthority.com/?p=11476#comment-183223 Hello Pinal,

My server has 4CPUs 32bit sql server 2008 OS:windows 2008.
I hav been facing a problem maximum CPU utilization by sql server(90 to 100%)there is only one database that is extensively used and only one application.But still the cpu utilization suddenly increases to 100% and the application gets hanged and we have to sometimes restart the server.Have enabled the Awe settin which was not there before and also monitored the server it shows high wait times for CXPACKET,ASYNC_NW_IO,LATCH_EX,SOS_SCHEDULAR_YEILD,
Hence i changed the MDOP which was 0 to 3 and it worked fine for a week but now again it is showing huge wait time for SOS_Schedular_yeild.
Also have to mention that there is only one drive i.e D: drive on the server. I am new to the performance issues hence unable to decide on whether we can use performance monitor to detect this as not sure of the counters to be used.
Its has 8GB memory.Also checked for blocking and updated the ststistics and also reindexed the tables .
Please assist in the same……..

]]> By: Jason Stamm http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-136928 Thu, 26 May 2011 19:52:30 +0000 http://blog.sqlauthority.com/?p=11476#comment-136928 I have used your blog for many issues and solutions, so many thanks!

However, this is one I cannot seem to find anything in regards to it.

We are trying to figure out why we have a procedure, same object_id, same database_id that is listed twice in this view sys.dm_exec_procedure_stats. I know it is possible to have the same procedure name listed, but everything tells me that this must have a different object_id. In our situation we have the same Object_Id and Database_Id for this one procedure.

When this situation happens the procedure run times are extremely long, most timeout after several minutes. Normal run times are sub-second for this procedure.

We have tried rebuilding indexes, but that had no effect on this issue.

Only way we have resolved this is to drop and create the procedure.

Anyone advise you can offer on this weird situation?

]]> By: liviu tamas http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-116017 Fri, 04 Feb 2011 11:01:27 +0000 http://blog.sqlauthority.com/?p=11476#comment-116017 Cannot initialize the data source object of OLE DB provider “MSDASQL” for linked server “(null)”.

]]> By: madhivanan http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-116012 Fri, 04 Feb 2011 10:46:21 +0000 http://blog.sqlauthority.com/?p=11476#comment-116012 Have you tried using a Linked Server?

]]> By: liviu tamas http://blog.sqlauthority.com/2011/02/04/sql-server-dmv-sys-dm_os_waiting_tasks-and-sys-dm_exec_requests-wait-type-day-4-of-28/#comment-116000 Fri, 04 Feb 2011 08:44:02 +0000 http://blog.sqlauthority.com/?p=11476#comment-116000 i have a question.your blog is very usefull to me.how can i import from foxpro (dbf)to sql server 2008 with openrowset ?
i know how to import from excel,but from dbf no.thanks a lot dave.

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