SQL Server - Query to return running queries (sp_WhoIsActive without consuming TempDB)

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Hello everybody!
How are you?

In today's post, I will show you how to return active SQL Server sessions, showing CPU usage, read and write quantity, which user is performing the query, what is being performed by this session, which software is used , what is the hostname, and a lot of other session and query information. For those who already know sp_WhoIsActive (If you don't know, learn more accessing this post), you will notice that they have a very similar return, and that was the purpose of the query itself.

Several times, I've had slow issues running sp_WhoIsActive in environments with high processing and disk containment and / or TempDB, causing the SP return to take several seconds, even a few minutes, as this SP is very busy. using TempDB to return results as it currently returns.

In order to provide a similar but lightweight solution that does not use TempDB, allowing it to run quickly even in scenarios like the one above, me and Tiago Neves we created this more "lean" version, returning the main information and without using the various parameters that the original SP provides us.

What is the difference for sp_WhoIsActive?

Does not use TempDB
Faster execution
Simpler code to understand
It can be easily used as a view, table-valued function or scalar function, allowing you to use order by, select into, where, etc.
In addition to showing the running query, it also shows the Outer Command (sp_WhoIsActive also shows if @get_outer_command = 1 is used)
If the session is from a job, shows the job name in the program_name column
Returns the execution plan XML (sp_WhoIsActive also shows if the @get_plans = 1 parameter is used)

Source code for “sp_Tiny_WhoIsActive”

With the source code below, you can return information from running sessions with just 1 SELECT, and you can even create a view to make future queries easier.

View source (Full version - SQL Server 2012 +)

SELECT
    RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 86400 AS VARCHAR), 2) + ' ' + 
    RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 3600) % 24 AS VARCHAR), 2) + ':' + 
    RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 60) % 60 AS VARCHAR), 2) + ':' + 
    RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) % 60 AS VARCHAR), 2) + '.' + 
    RIGHT('000' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) AS VARCHAR), 3) 
    AS Duration,
    A.session_id AS session_id,
    B.command,
    TRY_CAST('<?query --' + CHAR(10) + (
        SELECT TOP 1 SUBSTRING(X.[text], B.statement_start_offset / 2 + 1, ((CASE
                                                                          WHEN B.statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), X.[text])) * 2)
                                                                          ELSE B.statement_end_offset
                                                                      END
                                                                     ) - B.statement_start_offset
                                                                    ) / 2 + 1
                     )
    ) + CHAR(10) + '--?>' AS XML) AS sql_text,
    TRY_CAST('<?query --' + CHAR(10) + X.[text] + CHAR(10) + '--?>' AS XML) AS sql_command,
    A.login_name,
    '(' + CAST(COALESCE(E.wait_duration_ms, B.wait_time) AS VARCHAR(20)) + 'ms)' + COALESCE(E.wait_type, B.wait_type) + COALESCE((CASE 
        WHEN COALESCE(E.wait_type, B.wait_type) LIKE 'PAGE%LATCH%' THEN ':' + DB_NAME(LEFT(E.resource_description, CHARINDEX(':', E.resource_description) - 1)) + ':' + SUBSTRING(E.resource_description, CHARINDEX(':', E.resource_description) + 1, 999)
        WHEN COALESCE(E.wait_type, B.wait_type) = 'OLEDB' THEN '[' + REPLACE(REPLACE(E.resource_description, ' (SPID=', ':'), ')', '') + ']'
        ELSE ''
    END), '') AS wait_info,
    FORMAT(COALESCE(B.cpu_time, 0), '###,###,###,###,###,###,###,##0') AS CPU,
    FORMAT(COALESCE(F.tempdb_allocations, 0), '###,###,###,###,###,###,###,##0') AS tempdb_allocations,
    FORMAT(COALESCE((CASE WHEN F.tempdb_allocations > F.tempdb_current THEN F.tempdb_allocations - F.tempdb_current ELSE 0 END), 0), '###,###,###,###,###,###,###,##0') AS tempdb_current,
    FORMAT(COALESCE(B.logical_reads, 0), '###,###,###,###,###,###,###,##0') AS reads,
    FORMAT(COALESCE(B.writes, 0), '###,###,###,###,###,###,###,##0') AS writes,
    FORMAT(COALESCE(B.reads, 0), '###,###,###,###,###,###,###,##0') AS physical_reads,
    FORMAT(COALESCE(B.granted_query_memory, 0), '###,###,###,###,###,###,###,##0') AS used_memory,
    NULLIF(B.blocking_session_id, 0) AS blocking_session_id,
    COALESCE(G.blocked_session_count, 0) AS blocked_session_count,
    'KILL ' + CAST(A.session_id AS VARCHAR(10)) AS kill_command,
    (CASE 
        WHEN B.[deadlock_priority] <= -5 THEN 'Low'
        WHEN B.[deadlock_priority] > -5 AND B.[deadlock_priority] < 5 AND B.[deadlock_priority] < 5 THEN 'Normal'
        WHEN B.[deadlock_priority] >= 5 THEN 'High'
    END) + ' (' + CAST(B.[deadlock_priority] AS VARCHAR(3)) + ')' AS [deadlock_priority],
    B.row_count,
    COALESCE(A.open_transaction_count, 0) AS open_tran_count,
    (CASE B.transaction_isolation_level
        WHEN 0 THEN 'Unspecified' 
        WHEN 1 THEN 'ReadUncommitted' 
        WHEN 2 THEN 'ReadCommitted' 
        WHEN 3 THEN 'Repeatable' 
        WHEN 4 THEN 'Serializable' 
        WHEN 5 THEN 'Snapshot'
    END) AS transaction_isolation_level,
    A.[status],
    NULLIF(B.percent_complete, 0) AS percent_complete,
    A.[host_name],
    COALESCE(DB_NAME(CAST(B.database_id AS VARCHAR)), 'master') AS [database_name],
    (CASE WHEN D.name IS NOT NULL THEN 'SQLAgent - TSQL Job (' + D.[name] + ' - ' + SUBSTRING(A.[program_name], 67, LEN(A.[program_name]) - 67) +  ')' ELSE A.[program_name] END) AS [program_name],
    H.[name] AS resource_governor_group,
    COALESCE(B.start_time, A.last_request_end_time) AS start_time,
    A.login_time,
    COALESCE(B.request_id, 0) AS request_id,
    W.query_plan
FROM
    sys.dm_exec_sessions AS A WITH (NOLOCK)
    LEFT JOIN sys.dm_exec_requests AS B WITH (NOLOCK) ON A.session_id = B.session_id
    JOIN sys.dm_exec_connections AS C WITH (NOLOCK) ON A.session_id = C.session_id AND A.endpoint_id = C.endpoint_id
    LEFT JOIN msdb.dbo.sysjobs AS D ON RIGHT(D.job_id, 10) = RIGHT(SUBSTRING(A.[program_name], 30, 34), 10)
    LEFT JOIN (
        SELECT
            session_id, 
            wait_type,
            wait_duration_ms,
            resource_description,
            ROW_NUMBER() OVER(PARTITION BY session_id ORDER BY (CASE WHEN wait_type LIKE 'PAGE%LATCH%' THEN 0 ELSE 1 END), wait_duration_ms) AS Ranking
        FROM 
            sys.dm_os_waiting_tasks
    ) E ON A.session_id = E.session_id AND E.Ranking = 1
    LEFT JOIN (
        SELECT
            session_id,
            request_id,
            SUM(internal_objects_alloc_page_count + user_objects_alloc_page_count) AS tempdb_allocations,
            SUM(internal_objects_dealloc_page_count + user_objects_dealloc_page_count) AS tempdb_current
        FROM
            sys.dm_db_task_space_usage
        GROUP BY
            session_id,
            request_id
    ) F ON B.session_id = F.session_id AND B.request_id = F.request_id
    LEFT JOIN (
        SELECT 
            blocking_session_id,
            COUNT(*) AS blocked_session_count
        FROM 
            sys.dm_exec_requests
        WHERE 
            blocking_session_id != 0
        GROUP BY
            blocking_session_id
    ) G ON A.session_id = G.blocking_session_id
    OUTER APPLY sys.dm_exec_sql_text(COALESCE(B.[sql_handle], C.most_recent_sql_handle)) AS X
    OUTER APPLY sys.dm_exec_query_plan(B.plan_handle) AS W
    LEFT JOIN sys.dm_resource_governor_workload_groups H ON A.group_id = H.group_id
WHERE
    A.session_id > 50
    AND A.session_id <> @@SPID
    AND (A.[status] != 'sleeping' OR (A.[status] = 'sleeping' AND A.open_transaction_count > 0))

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SELECT

RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 86400 AS VARCHAR), 2) + ' ' +

RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 3600) % 24 AS VARCHAR), 2) + ':' +

RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 60) % 60 AS VARCHAR), 2) + ':' +

RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) % 60 AS VARCHAR), 2) + '.' +

RIGHT('000' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) AS VARCHAR), 3)

AS Duration,

A.session_id AS session_id,

B.command,

TRY_CAST('<?query --' + CHAR(10) + (

SELECT TOP 1 SUBSTRING(X.[text], B.statement_start_offset / 2 + 1, ((CASE

WHEN B.statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), X.[text])) * 2)

ELSE B.statement_end_offset

END

) - B.statement_start_offset

) / 2 + 1

)

) + CHAR(10) + '--?>' AS XML) AS sql_text,

TRY_CAST('<?query --' + CHAR(10) + X.[text] + CHAR(10) + '--?>' AS XML) AS sql_command,

A.login_name,

'(' + CAST(COALESCE(E.wait_duration_ms, B.wait_time) AS VARCHAR(20)) + 'ms)' + COALESCE(E.wait_type, B.wait_type) + COALESCE((CASE

WHEN COALESCE(E.wait_type, B.wait_type) LIKE 'PAGE%LATCH%' THEN ':' + DB_NAME(LEFT(E.resource_description, CHARINDEX(':', E.resource_description) - 1)) + ':' + SUBSTRING(E.resource_description, CHARINDEX(':', E.resource_description) + 1, 999)

WHEN COALESCE(E.wait_type, B.wait_type) = 'OLEDB' THEN '[' + REPLACE(REPLACE(E.resource_description, ' (SPID=', ':'), ')', '') + ']'

ELSE ''

END), '') AS wait_info,

FORMAT(COALESCE(B.cpu_time, 0), '###,###,###,###,###,###,###,##0') AS CPU,

FORMAT(COALESCE(F.tempdb_allocations, 0), '###,###,###,###,###,###,###,##0') AS tempdb_allocations,

FORMAT(COALESCE((CASE WHEN F.tempdb_allocations > F.tempdb_current THEN F.tempdb_allocations - F.tempdb_current ELSE 0 END), 0), '###,###,###,###,###,###,###,##0') AS tempdb_current,

FORMAT(COALESCE(B.logical_reads, 0), '###,###,###,###,###,###,###,##0') AS reads,

FORMAT(COALESCE(B.writes, 0), '###,###,###,###,###,###,###,##0') AS writes,

FORMAT(COALESCE(B.reads, 0), '###,###,###,###,###,###,###,##0') AS physical_reads,

FORMAT(COALESCE(B.granted_query_memory, 0), '###,###,###,###,###,###,###,##0') AS used_memory,

NULLIF(B.blocking_session_id, 0) AS blocking_session_id,

COALESCE(G.blocked_session_count, 0) AS blocked_session_count,

'KILL ' + CAST(A.session_id AS VARCHAR(10)) AS kill_command,

(CASE

WHEN B.[deadlock_priority] <= -5 THEN 'Low'

WHEN B.[deadlock_priority] > -5 AND B.[deadlock_priority] < 5 AND B.[deadlock_priority] < 5 THEN 'Normal'

WHEN B.[deadlock_priority] >= 5 THEN 'High'

END) + ' (' + CAST(B.[deadlock_priority] AS VARCHAR(3)) + ')' AS [deadlock_priority],

B.row_count,

COALESCE(A.open_transaction_count, 0) AS open_tran_count,

(CASE B.transaction_isolation_level

WHEN 0 THEN 'Unspecified'

WHEN 1 THEN 'ReadUncommitted'

WHEN 2 THEN 'ReadCommitted'

WHEN 3 THEN 'Repeatable'

WHEN 4 THEN 'Serializable'

WHEN 5 THEN 'Snapshot'

END) AS transaction_isolation_level,

A.[status],

NULLIF(B.percent_complete, 0) AS percent_complete,

A.[host_name],

COALESCE(DB_NAME(CAST(B.database_id AS VARCHAR)), 'master') AS [database_name],

(CASE WHEN D.name IS NOT NULL THEN 'SQLAgent - TSQL Job (' + D.[name] + ' - ' + SUBSTRING(A.[program_name], 67, LEN(A.[program_name]) - 67) + ')' ELSE A.[program_name] END) AS [program_name],

H.[name] AS resource_governor_group,

COALESCE(B.start_time, A.last_request_end_time) AS start_time,

A.login_time,

COALESCE(B.request_id, 0) AS request_id,

W.query_plan

FROM

sys.dm_exec_sessions AS A WITH (NOLOCK)

LEFT JOIN sys.dm_exec_requests AS B WITH (NOLOCK) ON A.session_id = B.session_id

JOIN sys.dm_exec_connections AS C WITH (NOLOCK) ON A.session_id = C.session_id AND A.endpoint_id = C.endpoint_id

LEFT JOIN msdb.dbo.sysjobs AS D ON RIGHT(D.job_id, 10) = RIGHT(SUBSTRING(A.[program_name], 30, 34), 10)

LEFT JOIN (

SELECT

session_id,

wait_type,

wait_duration_ms,

resource_description,

ROW_NUMBER() OVER(PARTITION BY session_id ORDER BY (CASE WHEN wait_type LIKE 'PAGE%LATCH%' THEN 0 ELSE 1 END), wait_duration_ms) AS Ranking

FROM

sys.dm_os_waiting_tasks

) E ON A.session_id = E.session_id AND E.Ranking = 1

LEFT JOIN (

SELECT

session_id,

request_id,

SUM(internal_objects_alloc_page_count + user_objects_alloc_page_count) AS tempdb_allocations,

SUM(internal_objects_dealloc_page_count + user_objects_dealloc_page_count) AS tempdb_current

FROM

sys.dm_db_task_space_usage

GROUP BY

session_id,

request_id

) F ON B.session_id = F.session_id AND B.request_id = F.request_id

LEFT JOIN (

SELECT

blocking_session_id,

COUNT(*) AS blocked_session_count

FROM

sys.dm_exec_requests

WHERE

blocking_session_id != 0

GROUP BY

blocking_session_id

) G ON A.session_id = G.blocking_session_id

OUTER APPLY sys.dm_exec_sql_text(COALESCE(B.[sql_handle], C.most_recent_sql_handle)) AS X

OUTER APPLY sys.dm_exec_query_plan(B.plan_handle) AS W

LEFT JOIN sys.dm_resource_governor_workload_groups H ON A.group_id = H.group_id

WHERE

A.session_id > 50

AND A.session_id <> @@SPID

AND (A.[status] != 'sleeping' OR (A.[status] = 'sleeping' AND A.open_transaction_count > 0))

If you want an even lighter and faster version, I've removed some features (such as execution plan XML view, lock session count, etc.) and made the code below available:

View source (Faster version with few features less)

SELECT
    RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 86400 AS VARCHAR), 2) + ' ' + 
    RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 3600) % 24 AS VARCHAR), 2) + ':' + 
    RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 60) % 60 AS VARCHAR), 2) + ':' + 
    RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) % 60 AS VARCHAR), 2) + '.' + 
    RIGHT('000' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) AS VARCHAR), 3) 
    AS Duration,
    A.session_id AS session_id,
    B.command,
    TRY_CAST('<?query --' + CHAR(10) + (
        SELECT TOP 1 SUBSTRING(X.[text], B.statement_start_offset / 2 + 1, ((CASE
                                                                          WHEN B.statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), X.[text])) * 2)
                                                                          ELSE B.statement_end_offset
                                                                      END
                                                                     ) - B.statement_start_offset
                                                                    ) / 2 + 1
                     )
    ) + CHAR(10) + '--?>' AS XML) AS sql_text,
    TRY_CAST('<?query --' + CHAR(10) + X.[text] + CHAR(10) + '--?>' AS XML) AS sql_command,
    A.login_name,
    '(' + CAST(COALESCE(E.wait_duration_ms, B.wait_time) AS VARCHAR(20)) + 'ms)' + COALESCE(E.wait_type, B.wait_type) + COALESCE((CASE 
        WHEN COALESCE(E.wait_type, B.wait_type) LIKE 'PAGEIOLATCH%' THEN ':' + DB_NAME(LEFT(E.resource_description, CHARINDEX(':', E.resource_description) - 1)) + ':' + SUBSTRING(E.resource_description, CHARINDEX(':', E.resource_description) + 1, 999)
        WHEN COALESCE(E.wait_type, B.wait_type) = 'OLEDB' THEN '[' + REPLACE(REPLACE(E.resource_description, ' (SPID=', ':'), ')', '') + ']'
        ELSE ''
    END), '') AS wait_info,
    FORMAT(COALESCE(B.cpu_time, 0), '###,###,###,###,###,###,###,##0') AS CPU,
    FORMAT(COALESCE(F.tempdb_allocations, 0), '###,###,###,###,###,###,###,##0') AS tempdb_allocations,
    FORMAT(COALESCE((CASE WHEN F.tempdb_allocations > F.tempdb_current THEN F.tempdb_allocations - F.tempdb_current ELSE 0 END), 0), '###,###,###,###,###,###,###,##0') AS tempdb_current,
    FORMAT(COALESCE(B.logical_reads, 0), '###,###,###,###,###,###,###,##0') AS reads,
    FORMAT(COALESCE(B.writes, 0), '###,###,###,###,###,###,###,##0') AS writes,
    FORMAT(COALESCE(B.reads, 0), '###,###,###,###,###,###,###,##0') AS physical_reads,
    FORMAT(COALESCE(B.granted_query_memory, 0), '###,###,###,###,###,###,###,##0') AS used_memory,
    NULLIF(B.blocking_session_id, 0) AS blocking_session_id,
    'KILL ' + CAST(A.session_id AS VARCHAR(10)) AS kill_command,
    (CASE 
        WHEN B.[deadlock_priority] <= -5 THEN 'Low'
        WHEN B.[deadlock_priority] > -5 AND B.[deadlock_priority] < 5 AND B.[deadlock_priority] < 5 THEN 'Normal'
        WHEN B.[deadlock_priority] >= 5 THEN 'High'
    END) + ' (' + CAST(B.[deadlock_priority] AS VARCHAR(3)) + ')' AS [deadlock_priority],
    B.row_count,
    COALESCE(A.open_transaction_count, 0) AS open_tran_count,
    (CASE B.transaction_isolation_level
        WHEN 0 THEN 'Unspecified' 
        WHEN 1 THEN 'ReadUncommitted' 
        WHEN 2 THEN 'ReadCommitted' 
        WHEN 3 THEN 'Repeatable' 
        WHEN 4 THEN 'Serializable' 
        WHEN 5 THEN 'Snapshot'
    END) AS transaction_isolation_level,
    A.[status],
    NULLIF(B.percent_complete, 0) AS percent_complete,
    A.[host_name],
    COALESCE(DB_NAME(CAST(B.database_id AS VARCHAR)), 'master') AS [database_name],
    A.[program_name],
    COALESCE(B.start_time, A.last_request_end_time) AS start_time,
    A.login_time,
    COALESCE(B.request_id, 0) AS request_id
FROM
    sys.dm_exec_sessions AS A WITH (NOLOCK)
    LEFT JOIN sys.dm_exec_requests AS B WITH (NOLOCK) ON A.session_id = B.session_id
    JOIN sys.dm_exec_connections AS C WITH (NOLOCK) ON A.session_id = C.session_id AND A.endpoint_id = C.endpoint_id
    LEFT JOIN (
        SELECT
            session_id, 
            wait_type,
	    wait_duration_ms,
            resource_description,
	    ROW_NUMBER() OVER(PARTITION BY session_id ORDER BY (CASE WHEN wait_type LIKE 'PAGEIO%' THEN 0 ELSE 1 END), wait_duration_ms) AS Ranking
        FROM 
            sys.dm_os_waiting_tasks
    ) E ON A.session_id = E.session_id AND E.Ranking = 1
    LEFT JOIN (
        SELECT
            session_id,
            request_id,
            SUM(internal_objects_alloc_page_count + user_objects_alloc_page_count) AS tempdb_allocations,
            SUM(internal_objects_dealloc_page_count + user_objects_dealloc_page_count) AS tempdb_current
        FROM
            sys.dm_db_task_space_usage
        GROUP BY
            session_id,
            request_id
    ) F ON B.session_id = F.session_id AND B.request_id = F.request_id
    OUTER APPLY sys.dm_exec_sql_text(COALESCE(B.[sql_handle], C.most_recent_sql_handle)) AS X
WHERE
    A.session_id > 50
    AND A.session_id <> @@SPID
    AND (A.[status] != 'sleeping' OR (A.[status] = 'sleeping' AND A.open_transaction_count > 0))

SELECT

RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 86400 AS VARCHAR), 2) + ' ' +

RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 3600) % 24 AS VARCHAR), 2) + ':' +

RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 60) % 60 AS VARCHAR), 2) + ':' +

RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) % 60 AS VARCHAR), 2) + '.' +

RIGHT('000' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) AS VARCHAR), 3)

AS Duration,

A.session_id AS session_id,

B.command,

TRY_CAST('<?query --' + CHAR(10) + (

SELECT TOP 1 SUBSTRING(X.[text], B.statement_start_offset / 2 + 1, ((CASE

WHEN B.statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), X.[text])) * 2)

ELSE B.statement_end_offset

END

) - B.statement_start_offset

) / 2 + 1

)

) + CHAR(10) + '--?>' AS XML) AS sql_text,

TRY_CAST('<?query --' + CHAR(10) + X.[text] + CHAR(10) + '--?>' AS XML) AS sql_command,

A.login_name,

'(' + CAST(COALESCE(E.wait_duration_ms, B.wait_time) AS VARCHAR(20)) + 'ms)' + COALESCE(E.wait_type, B.wait_type) + COALESCE((CASE

WHEN COALESCE(E.wait_type, B.wait_type) LIKE 'PAGEIOLATCH%' THEN ':' + DB_NAME(LEFT(E.resource_description, CHARINDEX(':', E.resource_description) - 1)) + ':' + SUBSTRING(E.resource_description, CHARINDEX(':', E.resource_description) + 1, 999)

WHEN COALESCE(E.wait_type, B.wait_type) = 'OLEDB' THEN '[' + REPLACE(REPLACE(E.resource_description, ' (SPID=', ':'), ')', '') + ']'

ELSE ''

END), '') AS wait_info,

FORMAT(COALESCE(B.cpu_time, 0), '###,###,###,###,###,###,###,##0') AS CPU,

FORMAT(COALESCE(F.tempdb_allocations, 0), '###,###,###,###,###,###,###,##0') AS tempdb_allocations,

FORMAT(COALESCE((CASE WHEN F.tempdb_allocations > F.tempdb_current THEN F.tempdb_allocations - F.tempdb_current ELSE 0 END), 0), '###,###,###,###,###,###,###,##0') AS tempdb_current,

FORMAT(COALESCE(B.logical_reads, 0), '###,###,###,###,###,###,###,##0') AS reads,

FORMAT(COALESCE(B.writes, 0), '###,###,###,###,###,###,###,##0') AS writes,

FORMAT(COALESCE(B.reads, 0), '###,###,###,###,###,###,###,##0') AS physical_reads,

FORMAT(COALESCE(B.granted_query_memory, 0), '###,###,###,###,###,###,###,##0') AS used_memory,

NULLIF(B.blocking_session_id, 0) AS blocking_session_id,

'KILL ' + CAST(A.session_id AS VARCHAR(10)) AS kill_command,

(CASE

WHEN B.[deadlock_priority] <= -5 THEN 'Low'

WHEN B.[deadlock_priority] > -5 AND B.[deadlock_priority] < 5 AND B.[deadlock_priority] < 5 THEN 'Normal'

WHEN B.[deadlock_priority] >= 5 THEN 'High'

END) + ' (' + CAST(B.[deadlock_priority] AS VARCHAR(3)) + ')' AS [deadlock_priority],

B.row_count,

COALESCE(A.open_transaction_count, 0) AS open_tran_count,

(CASE B.transaction_isolation_level

WHEN 0 THEN 'Unspecified'

WHEN 1 THEN 'ReadUncommitted'

WHEN 2 THEN 'ReadCommitted'

WHEN 3 THEN 'Repeatable'

WHEN 4 THEN 'Serializable'

WHEN 5 THEN 'Snapshot'

END) AS transaction_isolation_level,

A.[status],

NULLIF(B.percent_complete, 0) AS percent_complete,

A.[host_name],

COALESCE(DB_NAME(CAST(B.database_id AS VARCHAR)), 'master') AS [database_name],

A.[program_name],

COALESCE(B.start_time, A.last_request_end_time) AS start_time,

A.login_time,

COALESCE(B.request_id, 0) AS request_id

FROM

sys.dm_exec_sessions AS A WITH (NOLOCK)

LEFT JOIN sys.dm_exec_requests AS B WITH (NOLOCK) ON A.session_id = B.session_id

JOIN sys.dm_exec_connections AS C WITH (NOLOCK) ON A.session_id = C.session_id AND A.endpoint_id = C.endpoint_id

LEFT JOIN (

SELECT

session_id,

wait_type,

wait_duration_ms,

resource_description,

ROW_NUMBER() OVER(PARTITION BY session_id ORDER BY (CASE WHEN wait_type LIKE 'PAGEIO%' THEN 0 ELSE 1 END), wait_duration_ms) AS Ranking

FROM

sys.dm_os_waiting_tasks

) E ON A.session_id = E.session_id AND E.Ranking = 1

LEFT JOIN (

SELECT

session_id,

request_id,

SUM(internal_objects_alloc_page_count + user_objects_alloc_page_count) AS tempdb_allocations,

SUM(internal_objects_dealloc_page_count + user_objects_dealloc_page_count) AS tempdb_current

FROM

sys.dm_db_task_space_usage

GROUP BY

session_id,

request_id

) F ON B.session_id = F.session_id AND B.request_id = F.request_id

OUTER APPLY sys.dm_exec_sql_text(COALESCE(B.[sql_handle], C.most_recent_sql_handle)) AS X

WHERE

A.session_id > 50

AND A.session_id <> @@SPID

AND (A.[status] != 'sleeping' OR (A.[status] = 'sleeping' AND A.open_transaction_count > 0))

As you may have noticed, I use the FORMAT function, available from SQL Server 2012. If you are in an earlier version, running the code below will generate an error for you. Just remove this function to be able to use the query normally (The numbers just won't have the thousand separators, but that's even good for sorting), or use the version below:

View source (SQL Server 2008 and earlier)

SELECT
    RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 86400 AS VARCHAR), 2) + ' ' + 
    RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 3600) % 24 AS VARCHAR), 2) + ':' + 
    RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 60) % 60 AS VARCHAR), 2) + ':' + 
    RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) % 60 AS VARCHAR), 2) + '.' + 
    RIGHT('000' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) AS VARCHAR), 3) 
    AS Duration,
    A.session_id AS session_id,
    B.command,
    CAST('<?query --' + CHAR(10) + (
        SELECT TOP 1 SUBSTRING(X.[text], B.statement_start_offset / 2 + 1, ((CASE
                                                                          WHEN B.statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), X.[text])) * 2)
                                                                          ELSE B.statement_end_offset
                                                                      END
                                                                     ) - B.statement_start_offset
                                                                    ) / 2 + 1
                     )
    ) + CHAR(10) + '--?>' AS XML) AS sql_text,
    CAST('<?query --' + CHAR(10) + X.[text] + CHAR(10) + '--?>' AS XML) AS sql_command,
    A.login_name,
    '(' + CAST(COALESCE(E.wait_duration_ms, B.wait_time) AS VARCHAR(20)) + 'ms)' + COALESCE(E.wait_type, B.wait_type) + COALESCE((CASE 
        WHEN COALESCE(E.wait_type, B.wait_type) LIKE 'PAGEIOLATCH%' THEN ':' + DB_NAME(LEFT(E.resource_description, CHARINDEX(':', E.resource_description) - 1)) + ':' + SUBSTRING(E.resource_description, CHARINDEX(':', E.resource_description) + 1, 999)
        WHEN COALESCE(E.wait_type, B.wait_type) = 'OLEDB' THEN '[' + REPLACE(REPLACE(E.resource_description, ' (SPID=', ':'), ')', '') + ']'
        ELSE ''
    END), '') AS wait_info,
    COALESCE(B.cpu_time, 0) AS CPU,
    COALESCE(F.tempdb_allocations, 0) AS tempdb_allocations,
    COALESCE((CASE WHEN F.tempdb_allocations > F.tempdb_current THEN F.tempdb_allocations - F.tempdb_current ELSE 0 END), 0) AS tempdb_current,
    COALESCE(B.logical_reads, 0) AS reads,
    COALESCE(B.writes, 0) AS writes,
    COALESCE(B.reads, 0) AS physical_reads,
    COALESCE(B.granted_query_memory, 0) AS used_memory,
    NULLIF(B.blocking_session_id, 0) AS blocking_session_id,
    COALESCE(G.blocked_session_count, 0) AS blocked_session_count,
    'KILL ' + CAST(A.session_id AS VARCHAR(10)) AS kill_command,
    (CASE 
        WHEN B.[deadlock_priority] <= -5 THEN 'Low'
        WHEN B.[deadlock_priority] > -5 AND B.[deadlock_priority] < 5 AND B.[deadlock_priority] < 5 THEN 'Normal'
        WHEN B.[deadlock_priority] >= 5 THEN 'High'
    END) + ' (' + CAST(B.[deadlock_priority] AS VARCHAR(3)) + ')' AS [deadlock_priority],
    B.row_count,
    B.open_transaction_count,
    (CASE B.transaction_isolation_level
        WHEN 0 THEN 'Unspecified' 
        WHEN 1 THEN 'ReadUncommitted' 
        WHEN 2 THEN 'ReadCommitted' 
        WHEN 3 THEN 'Repeatable' 
        WHEN 4 THEN 'Serializable' 
        WHEN 5 THEN 'Snapshot'
    END) AS transaction_isolation_level,
    A.[status],
    NULLIF(B.percent_complete, 0) AS percent_complete,
    A.[host_name],
    COALESCE(DB_NAME(CAST(B.database_id AS VARCHAR)), 'master') AS [database_name],
    A.[program_name],
    H.[name] AS resource_governor_group,
    COALESCE(B.start_time, A.last_request_end_time) AS start_time,
    A.login_time,
    COALESCE(B.request_id, 0) AS request_id,
    W.query_plan
FROM
    sys.dm_exec_sessions AS A WITH (NOLOCK)
    LEFT JOIN sys.dm_exec_requests AS B WITH (NOLOCK) ON A.session_id = B.session_id
    JOIN sys.dm_exec_connections AS C WITH (NOLOCK) ON A.session_id = C.session_id AND A.endpoint_id = C.endpoint_id
    LEFT JOIN (
        SELECT
            session_id, 
            wait_type,
            wait_duration_ms,
            resource_description,
            ROW_NUMBER() OVER(PARTITION BY session_id ORDER BY (CASE WHEN wait_type LIKE 'PAGEIO%' THEN 0 ELSE 1 END), wait_duration_ms) AS Ranking
        FROM 
            sys.dm_os_waiting_tasks
    ) E ON A.session_id = E.session_id AND E.Ranking = 1
    LEFT JOIN (
        SELECT
            session_id,
            request_id,
            SUM(internal_objects_alloc_page_count + user_objects_alloc_page_count) AS tempdb_allocations,
            SUM(internal_objects_dealloc_page_count + user_objects_dealloc_page_count) AS tempdb_current
        FROM
            sys.dm_db_task_space_usage
        GROUP BY
            session_id,
            request_id
    ) F ON B.session_id = F.session_id AND B.request_id = F.request_id
    LEFT JOIN (
        SELECT 
            blocking_session_id,
            COUNT(*) AS blocked_session_count
        FROM 
            sys.dm_exec_requests
        WHERE 
            blocking_session_id != 0
        GROUP BY
            blocking_session_id
    ) G ON A.session_id = G.blocking_session_id
    OUTER APPLY sys.dm_exec_sql_text(COALESCE(B.[sql_handle], C.most_recent_sql_handle)) AS X
    OUTER APPLY sys.dm_exec_query_plan(B.[plan_handle]) AS W
    LEFT JOIN sys.dm_resource_governor_workload_groups H ON A.group_id = H.group_id
WHERE
    A.session_id > 50
    AND A.session_id <> @@SPID
    AND (A.[status] != 'sleeping' OR (A.[status] = 'sleeping' AND B.open_transaction_count > 0))

100

101

102

103

104

SELECT

RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 86400 AS VARCHAR), 2) + ' ' +

RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 3600) % 24 AS VARCHAR), 2) + ':' +

RIGHT('00' + CAST((DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) / 60) % 60 AS VARCHAR), 2) + ':' +

RIGHT('00' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) % 60 AS VARCHAR), 2) + '.' +

RIGHT('000' + CAST(DATEDIFF(SECOND, COALESCE(B.start_time, A.login_time), GETDATE()) AS VARCHAR), 3)

AS Duration,

A.session_id AS session_id,

B.command,

CAST('<?query --' + CHAR(10) + (

SELECT TOP 1 SUBSTRING(X.[text], B.statement_start_offset / 2 + 1, ((CASE

WHEN B.statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), X.[text])) * 2)

ELSE B.statement_end_offset

END

) - B.statement_start_offset

) / 2 + 1

)

) + CHAR(10) + '--?>' AS XML) AS sql_text,

CAST('<?query --' + CHAR(10) + X.[text] + CHAR(10) + '--?>' AS XML) AS sql_command,

A.login_name,

'(' + CAST(COALESCE(E.wait_duration_ms, B.wait_time) AS VARCHAR(20)) + 'ms)' + COALESCE(E.wait_type, B.wait_type) + COALESCE((CASE

WHEN COALESCE(E.wait_type, B.wait_type) = 'OLEDB' THEN '[' + REPLACE(REPLACE(E.resource_description, ' (SPID=', ':'), ')', '') + ']'

ELSE ''

END), '') AS wait_info,

COALESCE(B.cpu_time, 0) AS CPU,

COALESCE(F.tempdb_allocations, 0) AS tempdb_allocations,

COALESCE((CASE WHEN F.tempdb_allocations > F.tempdb_current THEN F.tempdb_allocations - F.tempdb_current ELSE 0 END), 0) AS tempdb_current,

COALESCE(B.logical_reads, 0) AS reads,

COALESCE(B.writes, 0) AS writes,

COALESCE(B.reads, 0) AS physical_reads,

COALESCE(B.granted_query_memory, 0) AS used_memory,

NULLIF(B.blocking_session_id, 0) AS blocking_session_id,

COALESCE(G.blocked_session_count, 0) AS blocked_session_count,

'KILL ' + CAST(A.session_id AS VARCHAR(10)) AS kill_command,

(CASE

WHEN B.[deadlock_priority] <= -5 THEN 'Low'

WHEN B.[deadlock_priority] > -5 AND B.[deadlock_priority] < 5 AND B.[deadlock_priority] < 5 THEN 'Normal'

WHEN B.[deadlock_priority] >= 5 THEN 'High'

END) + ' (' + CAST(B.[deadlock_priority] AS VARCHAR(3)) + ')' AS [deadlock_priority],

B.row_count,

B.open_transaction_count,

(CASE B.transaction_isolation_level

WHEN 0 THEN 'Unspecified'

WHEN 1 THEN 'ReadUncommitted'

WHEN 2 THEN 'ReadCommitted'

WHEN 3 THEN 'Repeatable'

WHEN 4 THEN 'Serializable'

WHEN 5 THEN 'Snapshot'

END) AS transaction_isolation_level,

A.[status],

NULLIF(B.percent_complete, 0) AS percent_complete,

A.[host_name],

COALESCE(DB_NAME(CAST(B.database_id AS VARCHAR)), 'master') AS [database_name],

A.[program_name],

H.[name] AS resource_governor_group,

COALESCE(B.start_time, A.last_request_end_time) AS start_time,

A.login_time,

COALESCE(B.request_id, 0) AS request_id,

W.query_plan

FROM

sys.dm_exec_sessions AS A WITH (NOLOCK)

LEFT JOIN sys.dm_exec_requests AS B WITH (NOLOCK) ON A.session_id = B.session_id

JOIN sys.dm_exec_connections AS C WITH (NOLOCK) ON A.session_id = C.session_id AND A.endpoint_id = C.endpoint_id

LEFT JOIN (

SELECT

session_id,

wait_type,

wait_duration_ms,

resource_description,

ROW_NUMBER() OVER(PARTITION BY session_id ORDER BY (CASE WHEN wait_type LIKE 'PAGEIO%' THEN 0 ELSE 1 END), wait_duration_ms) AS Ranking

FROM

sys.dm_os_waiting_tasks

) E ON A.session_id = E.session_id AND E.Ranking = 1

LEFT JOIN (

SELECT

session_id,

request_id,

SUM(internal_objects_alloc_page_count + user_objects_alloc_page_count) AS tempdb_allocations,

SUM(internal_objects_dealloc_page_count + user_objects_dealloc_page_count) AS tempdb_current

FROM

sys.dm_db_task_space_usage

GROUP BY

session_id,

request_id

) F ON B.session_id = F.session_id AND B.request_id = F.request_id

LEFT JOIN (

SELECT

blocking_session_id,

COUNT(*) AS blocked_session_count

FROM

sys.dm_exec_requests

WHERE

blocking_session_id != 0

GROUP BY

blocking_session_id

) G ON A.session_id = G.blocking_session_id

OUTER APPLY sys.dm_exec_sql_text(COALESCE(B.[sql_handle], C.most_recent_sql_handle)) AS X

OUTER APPLY sys.dm_exec_query_plan(B.[plan_handle]) AS W

LEFT JOIN sys.dm_resource_governor_workload_groups H ON A.group_id = H.group_id

WHERE

A.session_id > 50

AND A.session_id <> @@SPID

AND (A.[status] != 'sleeping' OR (A.[status] = 'sleeping' AND B.open_transaction_count > 0))

Query Execution Result

That's it folks!
If you have any suggestions or improvements, feel free to let me know in the comments or submit your change on the link. https://github.com/dirceuresende/tiny-sp_whoisactive.
Hope you enjoyed, a hug and see you next time!

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