Post reply

High CPU for "System" Process

  • March 17, 2017 at 12:27 pm

    #328431

    Never really come across this issue, i have a query when i execute overall server CPU gets to 80%.When i look in the details in task manager, whenever i run the query process "System" shows it is using 60% CPU and "sqlserver.exe" uses only 20 %. I do know the query has a missing index, just curious to know why "System" process is so pegged.

  • March 19, 2017 at 9:10 am

    #1933892

    curious_sqldba - Friday, March 17, 2017 12:27 PM

    Never really come across this issue, i have a query when i execute overall server CPU gets to 80%.When i look in the details in task manager, whenever i run the query process "System" shows it is using 60% CPU and "sqlserver.exe" uses only 20 %. I do know the query has a missing index, just curious to know why "System" process is so pegged.

    Maybe due to the "system" trying to do I/O to/from disk.  We can't really tell though because there's not enough information and it sounds like the query may have other problems.  Can you attach the ACTUAL execution plan?

    --Jeff Moden

    RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
    First step towards the paradigm shift of writing Set Based code:
    ________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

    Change is inevitable... Change for the better is not.

    Helpful Links:
    How to post code problems
    How to Post Performance Problems
    Create a Tally Function (fnTally)

Viewing 2 posts - 1 through 1 (of 1 total)

You must be logged in to reply to this topic. Login to reply