SQL Performance (MOSC)

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Looking for help to understand SQL performance

edited May 27, 2020 5:12AM in SQL Performance (MOSC) 3 commentsAnswered

Hi,

I'm trying to get a better hand on using Enterprise Manager to troubleshoot performance issues.  In the screenshot below, I'm trying to understand why the hash join (third line from top) is using 86% of the activity, which is almost all CPU.  It appears all the hash joins below that one, along with all the data retrieval, all run quite fast.  What can I do to figure out why that one particular hash join is taking so much of the time?

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