Here is your answer. First, use Chrome as browser, second you need to go with atleast 4vCPU*32GB of RAM & adjust the java heap sizes for SSO, Tomcat management server (TC), inventory server and P...
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Here is your answer. First, use Chrome as browser, second you need to go with atleast 4vCPU*32GB of RAM & adjust the java heap sizes for SSO, Tomcat management server (TC), inventory server and Profile driven storage to "fine tune" vCenter appliance with embedded or external Oracle DB. I did this and performance gains went 10X. This includes running vSAN enabled clusters. My recommendation that works great based on design documents: vCenter Server Inventory VMware VirtualCenter Management Webservices (tc Server) Inventory Service Profile-Driven Storage Service (sps) Large inventory (More than 400 hosts or 4000 virtual machines) 4GB 12GB 4GB Memory tuning on vCenter server appliance 5.5 Log in to vCenter server appliance using SSH vi /usr/lib/vmware-vsphere-client/server/wrapper/conf/wrapper.conf configuration file, look for JVM memory section and change maxmemory to 4096 Line 66 ############## JVM Memory#############wrapper.java.initmemory=512wrapper.java.maxmemory=4096 vi /usr/lib/vmware-vpx/inventoryservice/wrapper/conf/wrapper.conf configuration file, find wrapper.java.maxmemory parameter and change it to 12288 Line 116 # Maximum Java Heap Size (in MB)wrapper.java.maxmemory=12288 vi /usr/lib/vmware-vpx/sps/wrapper/conf/wrapper.conf find wrapper.java.maxmemory parameter and change it from 1024 to 4096 Line 154 # Maximum Java Heap Size (in MB)wrapper.java.maxmemory=4096 Reboot vCenter Appliance w/ external DB(1000 hosts)/embedded for lab (100 Hosts) http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=2005086&sliceId=1&docTypeID=DT_KB_1_1&dialogID=294472825&stateId=1%200%20294492358 vSphere 5.5 Documentation Center PS: vCenter 6.0 has much better performance based on my beta testing .. so don't loose hope yet. Lots of enhancements coming ... PS: I also vented about this here until I figured this out just recently: Re: Large customer - vCenter 5.5 U1c Web Client Response Time/ Performance and Navigation issues