SQL Server 2008 R2 – How to Get Notifications for Long-Running Queries or Deadlocks?

deadlockquery

I'd like to know if there is a way to send a notification on deadlock? If so what queries would be required. I understand that SQL Server takes care of deadlocks, I simply would like information on the queries involved.

I found the following to determine long-running queries:

SELECT 
    creation_time
    ,last_execution_time
    ,total_physical_reads
    ,total_logical_reads
    ,total_logical_writes
    , execution_count
    , total_worker_time
    , total_elapsed_time
    , total_elapsed_time / execution_count avg_elapsed_time
    ,SUBSTRING(st.text, (qs.statement_start_offset/2) + 1,
    ((CASE statement_end_offset
        WHEN -1 THEN DATALENGTH(st.text)
        ELSE qs.statement_end_offset END
    - qs.statement_start_offset)/2) + 1) AS statement_text
FROM sys.dm_exec_query_stats AS qs
    CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st  
where total_elapsed_time >= 300000000 --5 min
ORDER BY total_elapsed_time / execution_count DESC;

I'd like to know if the above is the right way to go, or is there a better way to determine if any query takes longer than a specific interval say 5 min as shown?

Thanks

Best Answer

With SQL 2008 there is a new feature that you can use for deadlocks and long running queires: extended events. Extended events are low level objects and consume much lesser resources than other methods like profiling/tracing, alerts, etc...

For using extended events with deadlocks check out this post by Jonathan Kehayias, a SQL server MVP.

For using extended events to find long running queries, check out this detailed post by Pinal Dave, another SQL server MVP.

Related Question