Already couple of days in my Exchange 2013 cluster CPU usage has increased.
Perfon shows, that noderunner.exe is one of top services.
When CPU usage of server increased, I noticed, that since this time also size of log files increased too in directoryProgramFiles\Microsoft\Exchange Server\V15\Bin\Search\Ceres\Diagnostics\Logs .
Latest changes are windows updates, but a week before CPU usage increased. During a week after windows updates everything was normal.
What might couse this problem?
I found a solution, that there is a option in noderunne.exe config file to limit memory usage but not a CPU.
Currently this limit is "0", whitch probably means, that this is unlimited.