using ESXTOP and swap

I have been instructed by a work colleague to create plugins Nagios that monitor the CPU, memory and swap usage of our ESX machines. Have almost completed the task, I will have questions my head around how an ESX Server uses Swap package. I understand it is swap dedicated to the console that can be listened to via the utility native linux 'free. ' My understanding is that this isn't the Exchange against what my colleague wants to monitor. In my view, that I would like to control the use of the Exchange reported by esxtop.

My question is how does a server ESX manage swap space and what is actually reported to me by the "SWAP/Mo' aka 'Swap used Mo' statistics given by esxtop?

An ESX server create/manage space separate global exchange on his SAN attached readers for all the VMS to use or does each VM create/manage their own space to swap out under construction?

It is more a global exchange space.  It is now by vm, which is represented by the .vswp file located in each virtual machine itself.  The virtual machine will create a swap file that is the difference between the memory allocated for them and the amount of memory reserved for him.  Where a host is out of memory, and share page and balloon does not provide sufficient space, the virtual machine will swap the memory of their vswp file.

-KjB

VMware vExpert

Tags: VMware

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