We recently moved to Exchange 2010 and decided to balance the exchange servers behind haproxy. We're currently running haproxy on an old Dell server with a Pentium D 915 2.8GHz and we're starting to pin the CPU now that most users have migrated to Exchange 2010. If we virtualize the machine and drop it in our VMWare infrastructure that runs on Xeon X5650 2.67GHz would we see a significant performance increase? I know haproxy is single process but would it benefit greatly from the newer architecture? I should also add that the current O/S is 32 bit RHEL 5 running 2.6.18.
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