Después de iniciar SSMS (2008 R2) en mi máquina de desarrollo, que inicio con

"D:\Program Files\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\Ssms.exe" -nosplash -S localhost -d testdata

sin hacer nada
en Activity Monitor observo algunas sesiones (TestData es mi base de datos predeterminada)

Detalles de la sesión 51:

select @@spid;
select SERVERPROPERTY('ProductLevel');

Detalles de la sesión 52:

DBCC INPUTBUFFER(52)  

Detalles de la sesión 53:

SELECT
CAST(serverproperty(N'Servername') AS sysname) AS [Name],
'Server[@Name=' + quotename(CAST(
        serverproperty(N'Servername')
       AS sysname),'''') + ']' + '/JobServer' AS [Urn]
ORDER BY
[Name] ASC

Detalles de la sesión 54:

SET NOCOUNT ON;

DECLARE @previous_collection_time datetime;
DECLARE @previous_request_count bigint;
DECLARE @current_collection_time datetime;
DECLARE @current_request_count bigint;
DECLARE @batch_requests_per_sec bigint;
DECLARE @interval_sec bigint;

-- Get the previous snapshot's time and batch request count
SELECT TOP 1 @previous_collection_time = collection_time, @previous_request_count = request_count 
FROM #am_request_count
ORDER BY collection_time DESC;

-- Get the current total time and batch request count
SET @current_collection_time = GETDATE();
SELECT @current_request_count = cntr_value 
FROM sys.sysperfinfo
WHERE counter_name = 'Batch Requests/sec' COLLATE Latin1_General_BIN;

SET @interval_sec = 
    -- Avoid divide-by-zero
    CASE
        WHEN DATEDIFF (second, @previous_collection_time, @current_collection_time) = 0 THEN 1
        ELSE DATEDIFF (second, @previous_collection_time, @current_collection_time)
    END;

-- Calc the Batch Requests/sec rate for the just-completed time interval. 
SET @batch_requests_per_sec = (@current_request_count - @previous_request_count) / @interval_sec;

-- Save off current batch count
INSERT INTO #am_request_count (collection_time, request_count) 
VALUES (@current_collection_time, @current_request_count);

-- Return the batch requests/sec rate for the just-completed time interval. 
SELECT ISNULL (@batch_requests_per_sec, 0) AS batch_requests_per_sec;

-- Get rid of all but the most recent snapshot's data
DELETE FROM #am_request_count WHERE collection_time < @current_collection_time; 

Si iniciar SSMS (conectarse a una instancia sin nombre mediante la autenticación de Windows) sin opciones, entonces no tengo la sesión correspondiente a la muestra anterior como 52

¿Qué había hecho para que se lanzaran todas esas sesiones?
Simplemente no recuerdo todo lo que había estado haciendo en mi dev SQL Server 2008 R2 antes ...

Actualizar:
Restablecí las mismas opciones en SSMS.exe (-nosplash -S localhost -d testdata), relancé SSMS y ahora tengo diferentes detalles correspondientes a los detalles de la sesión 51:

DECLARE @edition sysname; 
SET @edition = cast(SERVERPROPERTY(N'EDITION') as sysname); 
select case when @edition = N'SQL Azure' then 1 else 0 end as 'IsCloud' 

¿Por qué no lo tuve antes?