CPU usage goes High

  • If CPU goes high, what all analysis a DBA has to do?

  • Are you sure it is a process within SQL Server using high amounts of CPU? What else is running on the server?

    If you're sure you're supposed to be looking at SQL Server see Tip 3 in this article and look to tune queries with high "Average Worker Time" and "Total Worker Time" counts. Be mindful that sometimes tuning a query with a middle-of-the-road "Average Worker Time" but a high "Total Worker Time" can have a big impact on improving your overall system as well:

    http://www.sqlmag.com/article/sql-server/top-10-performance-tips-for-sql-server

    There are no special teachers of virtue, because virtue is taught by the whole community.
    --Plato

  • I would also check to see if there are scheduled jobs running in SQL Server Agent, perhaps there are some overlapping jobs or a job is running during a time when heavy load is on the server.

  • Also check and makes sure all HDs associated with SQL server are not full.

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