Comments on: SQL SERVER – 2008 – 2005 – Find Longest Running Query – TSQL – Part 2

By: peterb

peterb — Mon, 11 Apr 2011 15:34:59 +0000

My understanding is that sys.dm_exec_query_stats is for archived query statistics. I’ve been using the following to monitor active long running queries and it works fine for single statements – however it seems to return hugely inflated total_elapsed_time values with some procs or functions where multiple statements are run. I’m also interested if anyone know how to find the query completion times from DMVs?

THANKS

select …..
FROM sys.dm_exec_requests er
CROSS APPLY sys.dm_exec_sql_text(er.sql_handle) as st
INNER JOIN sys.dm_exec_sessions AS es
ON es.session_id = er.session_id
INNER JOIN sys.dm_exec_connections AS ec
ON ec.session_id = es.session_id
where er.total_elapsed_time / 1000.0 > @ElapsedThreshold
ORDER BY er.total_elapsed_time DESC;

By: Amir

Amir — Thu, 31 Mar 2011 00:18:44 +0000

Hi Pinal,

I think you don’t need to devide by 1000 for FrequencyPerSec

By: Gnana

Gnana — Wed, 01 Sep 2010 14:13:21 +0000

Hi Pinal,

we are getting “insufficient system memory to run this query” error. It’s a SQL 2k5 sp2 on Intel E5520 series machine. Please advise on this error…

By: Abhijit

Abhijit — Tue, 23 Feb 2010 07:37:40 +0000

I guess this query will also return the long running query. You can also add the filters to see the long running transactions.

SELECT DATEDIFF(MINUTE, a.last_batch, GETDATE()) RunningTime,
a.spid, a.blocked, a.waittime, db_name(a.dbid) As dbname,
a.last_batch, a.hostname, a.program_name,
a.nt_username, a.loginame, b.text as sqlstatement
FROM sys.sysprocesses A CROSS APPLY sys.dm_exec_sql_text(a.sql_handle) B
WHERE A.dbid > 4 —-to filter system databases
ORDER BY RunningTime DESC
GO

By: bhaskar

bhaskar — Fri, 20 Nov 2009 07:25:02 +0000

Hi,

Please add the hostname with this query.
I am not able to join sysprocess for hostname with this query.

By: Bhaskar

Bhaskar — Fri, 20 Nov 2009 07:00:20 +0000

Hi ,

Is there any method to get the host name with this query?
I am not able to connect this with sysprocesses to get the hostname.
Please help.

By: Imran Mohammed

Imran Mohammed — Sun, 23 Aug 2009 04:09:36 +0000

@Wayne,

Check This.

SELECT DISTINCT TOP 10
db_name(dbid) DatabaseName, — Added
t.TEXT QueryName,
s.execution_count AS ExecutionCount,
s.max_elapsed_time AS MaxElapsedTime,
ISNULL(s.total_elapsed_time / 1000 / NULLIF(s.execution_count, 0), 0) AS AvgElapsedTime,
s.creation_time AS LogCreatedOn,
ISNULL(s.execution_count / 1000 / NULLIF(DATEDIFF(s, s.creation_time, GETDATE()), 0), 0) AS FrequencyPerSec
FROM sys.dm_exec_query_stats s
CROSS APPLY sys.dm_exec_sql_text( s.sql_handle ) t
ORDER BY s.max_elapsed_time DESC, ExecutionCount DESC

I dont know why database name is returned NULL some times… Check this throughly before you use it…

~ IM.

By: Wayne Nelson

Wayne Nelson — Fri, 21 Aug 2009 16:05:25 +0000

I have multiple user databases. How would I modify the query to add a column showing which database the query is executing against?

By: Jerry Hung

Jerry Hung — Tue, 24 Feb 2009 16:51:11 +0000

Oops, don’t even know my name was mentioned, but thanks Pinal

Just want to share, came over this article 02/20 “usp_Worst_TSQL”
It’s a powerful script to find worst performing queries, with parameters

http://www.databasejournal.com/features/mssql/article.php/3802936/Finding-the-Worst-Performing-T-SQL-Statements-on-an-Instance.htm

By: Darshan Shah

Darshan Shah — Tue, 17 Feb 2009 16:06:32 +0000

This is for 2005 but what to do for sql server 2000?
I think we can use SQL profiler for that ,we can also check the using activity monitor,sysprocess,sp_locks , sp_who2 .

By: Sandle Wood

Sandle Wood — Wed, 28 Jan 2009 17:43:55 +0000

Again one easy to understand and nice blog based on SQL server….

By: Matt

Matt — Fri, 23 Jan 2009 09:28:32 +0000

Hello,

Just delete the “,” before the GO command.

Thanks

By: riley

riley — Fri, 23 Jan 2009 09:19:27 +0000

Nice blog with huge information about SQL SERVER. I just found your blog, and really enjoyed reading this post.