There might be situations where u might be getting requests from users saying that the entire website is slow or the application is slow. Situations like these could be because of a slow running query where users might have an impression of the enire server being slow and u might be getting Support Tickets related to that. Well Situations like these may demand you to look into some loong running queries on the server. Sometimes these long running queries may even be the cause for a complete server slowness depending on your isolation levels.
The main culprit in scenarios like these could be a long running query, which might be causing slowness.The best way to troubleshoot is to start looking for these queries one by one and identifying those queries and then troubleshooting the perfomance issue for that query. The below script helps us identify that.
In the image below shown the query is run on my personal laptop where no long running queries are present. However when u run the same on a production machine you will get a lot of queries being displayed in the results.
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