Performance Tuning with SQL Server Dynamic Management Views

Who is running what, right now?
Chapter 2: Connections, Sessions and Requests
Listing 2.17 makes use of sys.dm_exec_requests and sys.dm_exec_sql_text,
alongside our connections and sessions DMVs to provide a very useful "first look" at
which sessions are running what on a given instance.
-- Who is running what at this instant
SELECT dest.text AS [Command text] ,
des.login_time ,
des.[host_name] ,
des.[program_name] ,
der.session_id ,
dec.client_net_address ,
der.status ,
der.command ,
DB_NAME(der.database_id) AS DatabaseName
FROM sys.dm_exec_requests der
INNER JOIN sys.dm_exec_connections dec
ON der.session_id = dec.session_id
INNER JOIN sys.dm_exec_sessions des
ON des.session_id = der.session_id
CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS dest
WHERE des.is_user_process = 1
Listing 2.17: Who is running what?
A better version of sp_who2
Many of us DBAs are familiar with the sp_who and sp_who2 system stored procedures
for interrogating SQL Server activity. Listing 2.18 provides the syntax, and sample results,
from an execution of sp_who.
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