Here is the link collection, that i used to get more knowledge.
Interpreting esxtop Statistics
http://communities.vmware.com/docs/DOC-9279
Using esxtop to TroubleshootPerformance Problems
http://www.vmware.com/pdf/esx2_using_esxtop.pdf
Using the esxtop tool to identify VMware ESX memory use
http://searchvmware.techtarget.com/tip/Using-the-esxtop-tool-to-identify-VMware-ESX-memory-use
esxtop command showing high %RDY values for Virtual Machines running on NUMA enabled ESX hosts.
Performance Monitoring and Analysis
http://communities.vmware.com/docs/DOC-3930
Troubleshooting Performance Related Problems in vSphere 4.1 Environments