PARALLELISM is a close friend of DBA where you get to see it as a common occurence in the multi-processor server environment and during such performance issues you can also investigate whether a parallel plan is in use. For instance If a particular query is slow when it is using a parallel plan, you can try forcing a non-parallel plan by using the OPTION (MAXDOP 1) hint asper the documentation. CraigFreedman referring about parallel query execution and a discussion of query processing, query execution,...(<a href="http://sqlserver-qa.net/blogs/t-sql/archive/2007/09/04/1868.aspx">read more</a>)<img src="http://sqlserver-qa.net/aggbug.aspx?PostID=1868" width="1" height="1">