Performance optimization on VMWare VM's

[Sebastian Fohler]

I use HAPROXY on a ESXi 5.0 VM. To be exact I use two of them to load 
balance.
My greates problem seems to be the finetuneing and the ability to get 
the VM's stable enough.
For some reasons my haproxy instances are always giving up on estimated 
2500 connections.
Is there some howto or configuration guide for haproxy on vm's?
Best regards
Sebastian