DRS and Memory

Trying to undersigned the vmware memory managemnt.  Please see the attached screen shot is from a drs -monitoring tab.
Have a question on the guest memory bar. Hope someone will explain or direct me to correct kb article etc.
I see that there is a value for ballooned and swapped.
Does this mean that the esxi hosts in this cluster are under memory contention? or
What does it it means?
I am trying to find the expiation for this part, I do not see anything on vmware memory management article  other than explaining ballooing,swaping .drs.png
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sara2000Asked:
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Paul SolovyovskySenior IT AdvisorCommented:
balooned memory happens when there is contention

Ballooning reclaims memory by artificially increasing the memory
pressure inside the guest
•
Hypervisor swapping reclaims memory by having
ESXi directly swap out the virtual machine’s memory

good article on this

http://www.vmware.com/files/pdf/mem_mgmt_perf_vsphere5.pdf
compdigit44Commented:
I believe when a guest VM is ballooning this is bad because it means you host is running out of memory and trying to pull memory back from the VMs. I also noticed your VM is swapping. Sound like your host and VM need more memory resources

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piedthepiperCommented:
are you using resource pools? As that is another possible reason why you would be seeing this, esp when you have enough physical resources
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