Memory Tunning

Memory Metrics:-
Granted :- is total amount of memory configured to all the Virtual Machines in  total.
Active :- is the amount of memory pages the VM touched in recent times.Amount of guests "physical" memory actively used.
Consumed :- is the amount of memory the VM thinks it is going to use.Consumed memory is shared memory and memory that might be reserved but not actually used.Consumed is something like application requires like SQL +Vcenter service may need 3.5 GB but it might not use all 3.5Gb all the time.

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Average Memoery Active
mem.active.average on host or VM
Memoery estimated to be used based on recently touched memeory pages -this is the smallest of the active,consumed and granted.
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Average memory consumed
mem.consumed.average
Amount of memory consumed by one or all virtual machines is Memory granted - Memmory Saved by sharing
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Average Memeory Swapped in or out
-mem.swapin.average or mem.swapout.average
Amount of memmory swapped in or out of disk.
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Average memoery Swapped
Total amount of memory swapped.
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Average Memory reclaimed by Ballooning
-Mem.vmmemctl.average
-Memory reclamied by using ballooning
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ESXTOP :
h : To add or remove feilds
f : to added fields
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vKernel capacityview free tool and App view