A Better sp_who2 using DMVs (sp_who3)

A Better sp_who2 using DMVs (sp_who3)

The following code generates the same information found in sp_who2, along with some additional troubleshooting information. It also contains the SQL Statement being run, so instead of having to execute a separate DBCC INPUTBUFFER, the statement being executed is shown in the results.

Unlike sp_who2, this custom sp_who3 only shows sessions that have a current executing request.

What is also shown is the reads and writes for the current command, along with the number of reads and writes for the entire SPID. It also shows the protocol being used (TCP, NamedPipes, or Shared Memory).

CREATE PROCEDURE [dbo].[sp_who3]

AS

BEGIN

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED

SELECT

SPID                = er.session_id

,BlkBy              = er.blocking_session_id

,ElapsedMS          = er.total_elapsed_time

,CPU                = er.cpu_time

,IOReads            = er.logical_reads + er.reads

,IOWrites           = er.writes

,Executions         = ec.execution_count

,CommandType        = er.command

,ObjectName         = OBJECT_SCHEMA_NAME(qt.objectid,dbid) + '.' + OBJECT_NAME(qt.objectid, qt.dbid)

,SQLStatement       =

SUBSTRING

(

qt.text,

er.statement_start_offset/2,

(CASE WHEN er.statement_end_offset = -1

THEN LEN(CONVERT(nvarchar(MAX), qt.text)) * 2

ELSE er.statement_end_offset

END - er.statement_start_offset)/2

)

,Status             = ses.status

,[Login]            = ses.login_name

,Host               = ses.host_name

,DBName             = DB_Name(er.database_id)

,LastWaitType       = er.last_wait_type

,StartTime          = er.start_time

,Protocol           = con.net_transport

,transaction_isolation =

CASE ses.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

,ConnectionWrites   = con.num_writes

,ConnectionReads    = con.num_reads

,ClientAddress      = con.client_net_address

,Authentication     = con.auth_scheme

FROM sys.dm_exec_requests er

LEFT JOIN sys.dm_exec_sessions ses

ON ses.session_id = er.session_id

LEFT JOIN sys.dm_exec_connections con

ON con.session_id = ses.session_id

CROSS APPLY sys.dm_exec_sql_text(er.sql_handle) as qt

OUTER APPLY

(

SELECT execution_count = MAX(cp.usecounts)

FROM sys.dm_exec_cached_plans cp

WHERE cp.plan_handle = er.plan_handle

) ec

ORDER BY

er.blocking_session_id DESC,

er.logical_reads + er.reads DESC,

er.session_id

END