3.5 – CPU Waits – SOS_SCHEDULER_YIELD and THREADPOOL (44m)

SOS_SCHEDULER_YIELD means the SQL Operating System (SOS) is waiting for a CPU scheduler to yield more time, but this wait is a little trickier than that. You have to look at not just the wait time, but the average wait time, because some SOS_SCHEDULER_YIELD waits can just mean a mostly-idle server running single-threaded queries. THREADPOOL…

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SOS_SCHEDULER_YIELD means the SQL Operating System (SOS) is waiting for a CPU scheduler to yield more time, but this wait is a little trickier than that. You have to look at not just the wait time, but the average wait time, because some SOS_SCHEDULER_YIELD waits can just mean a mostly-idle server running single-threaded queries. THREADPOOL...
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