1

I have a server that is churning up the CPU using 60% to 80% constantly. Using a tool from Brent Ozar's First Responder Kit, it shows RING_BUFFER_SCHEDULER_MONITOR is the culprit. What is this, and how can I track down what is doing this?

60%. Ring buffer details: <Record id="3592" type="RING_BUFFER_SCHEDULER_MONITOR" time="215993000"><SchedulerMonitorEvent><SystemHealth><ProcessUtilization>57</ProcessUtilization><SystemIdle>40</SystemIdle><UserModeTime>2748425618</UserModeTime><KernelModeTime>27144174</KernelModeTime><PageFaults>986</PageFaults><WorkingSetDelta>94208</WorkingSetDelta><MemoryUtilization>100</MemoryUtilization></SystemHealth></SchedulerMonitorEvent></Record>
4

Well, no, not exactly. My fault for not making the wording on that a little better.

You're using sp_BlitzFirst, and here's something similar to what you're seeing:

enter image description here

It's reporting CPU usage and where I found it in the DMVs - the ring buffer. The ring buffer isn't CAUSING the high CPU use.

To find queries doing high CPU use, use sp_BlitzCache @SortOrder = 'cpu'.

For more details, check out this post from Microsoft's Premier Field Engineering team on using ring buffers to track CPU usage inside SQL Server.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.