I have a stored procedure called sp_radhe that I put on my servers and it has been helping me to "see" what is happening internally.
here is the code of this stored procedure:
USE [master]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
--DROP PROCEDURE dbo.sp_radhe
GO
CREATE PROCEDURE dbo.sp_radhe
AS
/*
=======================================================================
Script : SP_RADHE
Author : Marcelo Miorelli
Date : 04 MAR 2013 Wednesday
Desc : shows the current processes
Usage : sp_radhe
-- same as sp_who2
=======================================================================
History
Date Action User Desc
-----------------------------------------------------------------------
27-oct-2014 changed Marcelo Miorelli commented out the line --and es.status = 'running'
so the procedure returns any es.status
=======================================================================
*/
--======================================
-- describe primary blocks of processing
--======================================
------------------------------------------------
-- describe action of logical groups of commands
------------------------------------------------
-- describe individual actions within a command set
BEGIN
SET NOCOUNT ON
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SELECT es.session_id AS session_id
,COALESCE(es.original_login_name, 'No Info') AS login_name
,COALESCE(es.host_name,'No Info') AS hostname
,COALESCE(es.last_request_end_time,es.last_request_start_time) AS last_batch
,es.status
,COALESCE(er.blocking_session_id,0) AS blocked_by
,COALESCE(er.wait_type,'MISCELLANEOUS') AS waittype
,COALESCE(er.wait_time,0) AS waittime
,COALESCE(er.last_wait_type,'MISCELLANEOUS') AS lastwaittype
,COALESCE(er.wait_resource,'') AS waitresource
,coalesce(db_name(er.database_id),'No Info') as dbid
,COALESCE(er.command,'AWAITING COMMAND') AS cmd
,sql_text=st.text
,transaction_isolation =
CASE es.transaction_isolation_level
WHEN 0 THEN 'Unspecified'
WHEN 1 THEN 'Read Uncommitted'
WHEN 2 THEN 'Read Committed'
WHEN 3 THEN 'Repeatable'
WHEN 4 THEN 'Serializable'
WHEN 5 THEN 'Snapshot'
END
,COALESCE(es.cpu_time,0)
+ COALESCE(er.cpu_time,0) AS cpu
,COALESCE(es.reads,0)
+ COALESCE(es.writes,0)
+ COALESCE(er.reads,0)
+ COALESCE(er.writes,0) AS physical_io
,COALESCE(er.open_transaction_count,-1) AS open_tran
,COALESCE(es.program_name,'') AS program_name
,es.login_time
FROM sys.dm_exec_sessions es
LEFT OUTER JOIN sys.dm_exec_connections ec ON es.session_id = ec.session_id
LEFT OUTER JOIN sys.dm_exec_requests er ON es.session_id = er.session_id
LEFT OUTER JOIN sys.server_principals sp ON es.security_id = sp.sid
LEFT OUTER JOIN sys.dm_os_tasks ota ON es.session_id = ota.session_id
LEFT OUTER JOIN sys.dm_os_threads oth ON ota.worker_address = oth.worker_address
CROSS APPLY sys.dm_exec_sql_text(er.sql_handle) AS st
where es.is_user_process = 1
and es.session_id <> @@spid
--and es.status = 'running'
GO
exec sys.sp_MS_marksystemobject 'sp_radhe'
GO
However, when a process is being blocked by some other process that is not active, I am struggling to figure it out the T-SQL of the blocking code.
For example:
the session 92 you can see on the above picture is a select
and the session 75 is an update that I left the transaction open.
session 92
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
SELECT TOP 1000 [accountID]
,[accountCreateKeyID]
,[totalAccountCreditValueLocal]
,[accountCreateDate]
,[createdDate]
,[createdBy]
,[modifiedDate]
,[modifiedBy]
FROM [TableBackups].[dbo].[_AO20150806_crm_build_account_DoNotDelete]
WITH (HOLDLOCK)
session 75
BEGIN TRANSACTION T1
SELECT @@TRANCOUNT
update
[TableBackups].[dbo].[_AO20150806_crm_build_account_DoNotDelete]
set [totalAccountCreditValueLocal] = 1000
where accountID = 1
How can I find the code of the blocking session, in this case, the session 75 when the session's status is 'sleeping'?
New version
this new version shows also the blocking session, however, I could not find out how to get the database name and other data from a sleeping session.
SET NOCOUNT ON
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SELECT es.session_id AS session_id
,COALESCE(es.original_login_name, 'No Info') AS login_name
,COALESCE(es.host_name,'No Info') AS hostname
,COALESCE(es.last_request_end_time,es.last_request_start_time) AS last_batch
,es.status
,COALESCE(er.blocking_session_id,0) AS blocked_by
,COALESCE(er.wait_type,'MISCELLANEOUS') AS waittype
,COALESCE(er.wait_time,0) AS waittime
,COALESCE(er.last_wait_type,'MISCELLANEOUS') AS lastwaittype
,COALESCE(er.wait_resource,'') AS waitresource
,coalesce(db_name(er.database_id),'No Info') as dbid
,COALESCE(er.command,'AWAITING COMMAND') AS cmd
,sql_text=st.text
,transaction_isolation =
CASE es.transaction_isolation_level
WHEN 0 THEN 'Unspecified'
WHEN 1 THEN 'Read Uncommitted'
WHEN 2 THEN 'Read Committed'
WHEN 3 THEN 'Repeatable'
WHEN 4 THEN 'Serializable'
WHEN 5 THEN 'Snapshot'
END
,COALESCE(es.cpu_time,0)
+ COALESCE(er.cpu_time,0) AS cpu
,COALESCE(es.reads,0)
+ COALESCE(es.writes,0)
+ COALESCE(er.reads,0)
+ COALESCE(er.writes,0) AS physical_io
,COALESCE(er.open_transaction_count,-1) AS open_tran
,COALESCE(es.program_name,'') AS program_name
,es.login_time
FROM sys.dm_exec_sessions es
LEFT OUTER JOIN sys.dm_exec_connections ec ON es.session_id = ec.session_id
LEFT OUTER JOIN sys.dm_exec_requests er ON es.session_id = er.session_id
LEFT OUTER JOIN sys.server_principals sp ON es.security_id = sp.sid
LEFT OUTER JOIN sys.dm_os_tasks ota ON es.session_id = ota.session_id
LEFT OUTER JOIN sys.dm_os_threads oth ON ota.worker_address = oth.worker_address
CROSS APPLY sys.dm_exec_sql_text(er.sql_handle) AS st
where es.is_user_process = 1
and es.session_id <> @@spid
UNION
SELECT es.session_id AS session_id
,COALESCE(es.original_login_name, 'No Info') AS login_name
,COALESCE(es.host_name,'No Info') AS hostname
,COALESCE(es.last_request_end_time,es.last_request_start_time) AS last_batch
,es.status
,COALESCE(er.blocking_session_id,0) AS blocked_by
,COALESCE(er.wait_type,'MISCELLANEOUS') AS waittype
,COALESCE(er.wait_time,0) AS waittime
,COALESCE(er.last_wait_type,'MISCELLANEOUS') AS lastwaittype
,COALESCE(er.wait_resource,'') AS waitresource
,coalesce(db_name(er.database_id),'No Info') as dbid
,COALESCE(er.command,'AWAITING COMMAND') AS cmd
,sql_text=st.text
,transaction_isolation =
CASE es.transaction_isolation_level
WHEN 0 THEN 'Unspecified'
WHEN 1 THEN 'Read Uncommitted'
WHEN 2 THEN 'Read Committed'
WHEN 3 THEN 'Repeatable'
WHEN 4 THEN 'Serializable'
WHEN 5 THEN 'Snapshot'
END
,COALESCE(es.cpu_time,0)
+ COALESCE(er.cpu_time,0) AS cpu
,COALESCE(es.reads,0)
+ COALESCE(es.writes,0)
+ COALESCE(er.reads,0)
+ COALESCE(er.writes,0) AS physical_io
,COALESCE(er.open_transaction_count,-1) AS open_tran
,COALESCE(es.program_name,'') AS program_name
,es.login_time
FROM sys.dm_exec_sessions es
INNER JOIN sys.dm_exec_requests ec2 ON es.session_id = ec2.blocking_session_id
LEFT OUTER JOIN sys.dm_exec_connections ec ON es.session_id = ec.session_id
LEFT OUTER JOIN sys.dm_exec_requests er ON es.session_id = er.session_id
LEFT OUTER JOIN sys.server_principals sp ON es.security_id = sp.sid
LEFT OUTER JOIN sys.dm_os_tasks ota ON es.session_id = ota.session_id
LEFT OUTER JOIN sys.dm_os_threads oth ON ota.worker_address = oth.worker_address
CROSS APPLY sys.dm_exec_sql_text(ec.most_recent_sql_handle) AS st
where es.is_user_process = 1
and es.session_id <> @@spid
Best Answer
You can use