High CPU during calendar-sync of patient application to exchange

%3CLINGO-SUB%20id%3D%22lingo-sub-1939720%22%20slang%3D%22en-US%22%3EHigh%20CPU%20during%20calendar-sync%20of%20patient%20application%20to%20exchange%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1939720%22%20slang%3D%22en-US%22%3E%3CP%3EHello%20everyone.%3CBR%20%2F%3EA%20customer%20(hospital)%20has%20a%20software%20with%20which%20the%20patient%20appointments%20with%20the%20respective%20doctors%20are%20planned.%3CBR%20%2F%3EEvery%2030%20minutes%20this%20software%20synchronizes%20the%20calendar%20entries%20in%20the%20mailbox%20of%20the%20respective%20doctors%20with%20a%20service%20account%20with%20impersonation%20rights%20via%20EWS.%3CBR%20%2F%3ENormally%20the%20CPU%20utilization%20of%20the%20Exchange%20Server%20is%20about%2020%25.%20During%20the%202%20minutes%20that%20the%20calendar%20synchronization%20takes%20place%2C%20the%20CPU%20usage%20increases%20to%20about%2095%25.%20During%20these%202%20minutes%20the%20users%20have%20a%20freeze%20in%20Outlook.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EIt%20is%20the%20w3wp.exe-EWS%20process%20and%20Exchange.Store.Worker.exe%20that%20increases%20CPU%20usage%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EI%20have%20already%20tried%20with%20Throtteling%20Policy%2C%20but%20without%20success%20so%20far.%20(But%20I%20don't%20really%20know%20much%20about%20Throtteling)%3C%2FP%3E%3CP%3E%3CBR%20%2F%3EEwsCostThreshold%20%3A%2050%3CBR%20%2F%3EEwsMaxConcurrency%20%3A%2027%3CBR%20%2F%3EEwsMaxBurst%20%3A%20300000%3CBR%20%2F%3EEwsRechargeRate%20%3A%201800000%3CBR%20%2F%3EEwsCutoffBalance%20%3A%200%3CBR%20%2F%3EEwsMaxSubscriptions%20%3A%20100%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EDoes%20anybody%20have%20a%20tip%20what%20else%20I%20could%20do%3F%3CBR%20%2F%3EThanks%20and%20best%20regards%3C%2FP%3E%3CP%3E%3CBR%20%2F%3EMarc%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-1939720%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3E2016%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EExchange%20Server%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
Occasional Contributor

Hello everyone.
A customer (hospital) has a software with which the patient appointments with the respective doctors are planned.
Every 30 minutes this software synchronizes the calendar entries in the mailbox of the respective doctors with a service account with impersonation rights via EWS.
Normally the CPU utilization of the Exchange Server is about 20%. During the 2 minutes that the calendar synchronization takes place, the CPU usage increases to about 95%. During these 2 minutes the users have a freeze in Outlook.

 

It is the w3wp.exe-EWS process and Exchange.Store.Worker.exe that increases CPU usage

 

I have already tried with Throtteling Policy, but without success so far. (But I don't really know much about Throtteling)


EwsCostThreshold : 50
EwsMaxConcurrency : 27
EwsMaxBurst : 300000
EwsRechargeRate : 1800000
EwsCutoffBalance : 0
EwsMaxSubscriptions : 100

 

Does anybody have a tip what else I could do?
Thanks and best regards


Marc

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