Should I monitor the SQL Server tempdb for user activity?

Question

I am currently auditing all databases on SQL Server 2008 R2 for specific events ( database accounts related activity) . I get alot of events generated for
tempdb. I am monitoring the following events 47, 102, 103, 104, 105, 108, 109, 110, 111, 113, 117, 130, 170, 171, 173, 176 is what I am monitoring.
Do I need to monitor tempdb or is it alright to exclude the
tempdb?
Thanks in advance.

Answer 1

What is your tempdb configuration? Is it located on separated physical drives? Are you observing bottleneck on tempdb?
--user sessions that are
 --allocating internal objects, including currently active tasks
SELECT  
    t1.session_id, 
    (t1.internal_objects_alloc_page_count + task_alloc) as allocated, 
    (t1.internal_objects_dealloc_page_count + task_dealloc) as     
    deallocated  
from sys.dm_db_session_space_usage as t1,  
    (select session_id,  
        sum(internal_objects_alloc_page_count) 
            as task_alloc, 
    sum (internal_objects_dealloc_page_count) as  
        task_dealloc  
      from sys.dm_db_task_space_usage group by session_id) as t2 
where t1.session_id = t2.session_id and t1.session_id >50 
order by allocated DESC
the allocation bottleneck is caused 
when allocation structures are accessed
 by concurrent threads in conflicting modes. 
Since the database id of TempDB is 2,
 the search argument ‘2.%’ represents any page 
in TempDB across any file. If this page happens 
to be GAM, SGAM or PFS, it will represent allocation bottleneck. 
Note, in a concurrent application, some blocking is expected so
 you will need to baseline the allocation waits when your 
application is performing normally. 
Only when the waits exceed the baseline significantly,
 it signals that you are incurring allocation bottleneck.
select   session_id, wait_duration_ms,   resource_description 
      from    sys.dm_os_waiting_tasks
      where   wait_type like 'PAGE%LATCH_%' and
              resource_description like '2:%'
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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