How to troubleshoot ESXi host consuming large amount of memory?

Greetings,

I have an esxi host with about 132 GB of RAM. It is showing between 88% and 92% memory usage. I only have 3 servers running on this host. A vCenter 5.5 appliance, a DC, and exchange 2013. On exchange vm summary, consumed host memory is 112942.00 MB. Active guest memory is 10485.00 MB. Task manager on exchange shows only 45% memory usage. Nonetheless, exchange is running slow.  

Any ideas on how to deal with this are greatly appreciated.
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king daddyAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
And what is the total of memory assigned to each VM

ESXi hosts are designed when fully optimised to use as much HOST RAM as possible providing you do not use 100% there is no issue

VMs cannot use more than what you have defined

So if you configure a VM to use 48GB it cannot use more than this!
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AmitIT ArchitectCommented:
Exchange is designed to use maximum available memory. It is by design. Are you providing resource dynamically or static to these servers.
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king daddyAuthor Commented:
Dynamically as the memory resource setting is set to unlimited. Thanks for the quick reply.
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AmitIT ArchitectCommented:
Ok, change it to static.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Static and Dynamic for vSphere is foo bar!

This is not Hyper-V
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
And it's consuming that amount of memory because you have allocated that memory to VMs

E.g total up Exchange VM + DC + Appliance memory what is the total?
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king daddyAuthor Commented:
Thanks Andrew. Sorry for taking a while to get back. I went in and allocated set amounts of RAM for each server, giving Exchange 64 GB of the 130 available on the host and we are not seeing memory getting into the 90% range anymore.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Very good but it's not an issue!
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king daddyAuthor Commented:
Ha! I believe you but I'm not arguing with my boss or the client! Thanks again.
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