Vmware performance question

What are some steps/tips/tools I can test performance with? Of the 4 esxi servers only one of them will run our terminal servers where users dont complain about it being slow. Two of the servers are fairly close in hardware specs, R620 and a R630. The other two are R610s. One would think our TS should run fine on the 620 since it is close in hardware specification to the 630 but they run about the same as if they were on the 610s, If I migrate the TS's to the 630 it runs just fine.
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
Monitor performance?

see my EE Article

HOW TO:  Performance Monitor vSphere 4.x or 5.0

In my personal experience TS servers are not good candidates for virtualisation, if you compare a bare metal TS server to a VM.

You may find, you have to have more VM servers for your concurrent users, compared to physical servers, check sockets allocated (not cores!), and check Disk I/O and Memory.

also check the balloon driver is disabled, so VMware vSphere does not inflate it on hosts with memory pressure, also avoid migration of VMs using vMotion, which can cause a performance impact whilst migration.

make sure VMXNET3 drivers is in use and VMware Tools installed
stlhostAuthor Commented:
ok thank you
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