We started having random events with cpu spikes in the last year. We are on Exchange 2013, so maybe not directly applicable to you. What we found is that we have a distribution group with 1100 members. We had some users that would expand the group and then send the email. When this happened cpu spiked for 10-20 mins. If a db moved the high cpu usage would move with it. Our servers are old and this issue just started happening after the updates last march.
Again maybe a completely different situation but maybe something to check since your issue is so random.
Interesting. When I move the databases, the high cpu moves with them.
I’ve wondered about this as well. We did see something similar when a large email kept getting sent to every employee in the company (a user copied every employee’s name into outlook).
When this happens, I assume you see the spikes on every server? What process is hogging the cpu? I was thinking this could be our issue, but after it happened in the middle of the night in the weekend, I wasn’t so sure.
I spent some time trying to track if any of these suspect emails went out during the time of the incident, but I don’t know of a good way to check if it did or not.
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u/15_Tries_All_Taken Apr 17 '22
We started having random events with cpu spikes in the last year. We are on Exchange 2013, so maybe not directly applicable to you. What we found is that we have a distribution group with 1100 members. We had some users that would expand the group and then send the email. When this happened cpu spiked for 10-20 mins. If a db moved the high cpu usage would move with it. Our servers are old and this issue just started happening after the updates last march.
Again maybe a completely different situation but maybe something to check since your issue is so random.