Execution plan icons

  • I look at execution plans fairly often in Query Analyzer with the "Show Execution Plan" option.  Today, while troubleshooting a slow query, most of the icons had a smaller icon overlaying the normal ones.  It is a small yellow circle with three arrows in it pointing to the left, positioned over the normal icons in the lower right hand corner.

    Not all the icons had it, but most did.  Some index seeks would have it, some wouldn't, etc. 

    Couldn't find anything online or in BOL about it.  Anyone know what this means? 

  • That means the operation is being performed in parallel; i.e. the execution has been split into multiple threads being processed in parallel by multiple processors.



    --Jonathan

  • Guess that should have been more obvious to me since we just switched to a multi processor server

  • Where can a complete list of the meaning of all the icons be located?

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