i have a multi role exchange server, mailbox, client and hub. I have 200 user mailboxes some of which have multiple mobile devices (mix of android, iphone and ipads). I have 20GB ram on the virtual machine and 4 cores on the CPU. The Virtual host (VMWare 5.1) has ample resources and is underutilized. What i am seeing is that there is very high CPU usage at certain times but then at other times CPU usage will drop to almost nothing. I cannot say its one particular service that causes the spikes, but there are a few which sometimes pull 50% CPU. Store.exe sometimes eats 40 or 50% and EdgeTransport.exe will sometimes hit a high number like 60%.. what worries me is that sometimes i will see CPU usage at 100% for a few minutes at a time... does this sound normal?
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