@andriy.sultanov - that sure sounds like it, thank you, let me know if I can help in any way. These are production servers but I can't imagine RRD causing any issues for them.

@andriy.sultanov - that sure sounds like it, thank you, let me know if I can help in any way. These are production servers but I can't imagine RRD causing any issues for them.

@tjkreidl No chance of electrical issue as all four servers have dual power supplies fed by two independent UPSs. This oddity only began after the updates applied three days ago. Does not happen with the same frequency or timing. A/C server room sitting at 70 degrees, all four servers racked together with great air flow. Again, this just started after the last updates.

It would seem that I am seeing this effect on all four of my servers, the usage was too low to see the event before. Here is my 3rd busiest server:

It doesn't seem to be entirely 5 minute based, looking at the second server I see a different interval. When I get a minute I'll pull some raw RRD data for you.

I am running four instances of xcp-ng 8.3 with latest maintenance patches installed over the weekend. All four servers are the same Dell R720 but two of the boxes have a little more load than the other two. When viewing the stats of the two heavier loaded boxes they are now showing a CPU usage dropping to zero every 5 minutes or thereabouts. The server logs are totally empty and there is no slowness felt during these "outages". Is anybody else seeing this, or know what is going on, it appears to be a display problem only so far.

Running XO Community:

• Xen Orchestra, commit 9a833
• Master, commit a82af